[SD + ASR] Can't use local ASR model produce word timestamp.
Hi,
I want to join my ASR model into `offline_diar_with_asr_infer.py` and use `asr_based_vad`.
But the following error is appearance.

```Error executing job with overrides: []
Traceback (most recent call last):
  File "offline_diar_with_asr_infer.py", line 55, in main
    word_hyp, word_ts_hyp = asr_decoder_ts.run_ASR(asr_model)
TypeError: 'NoneType' object is not callable
```
If `cfg.diarizer.asr.model_path=???` it will show another error.
```ValueError: `cfg` must have `tokenizer` config to create a tokenizer !```

I think that is about the inconsistency between my ASR class and this task, but I'm not very sure.
Is something that I have not noticed, please?


**Steps/Code to reproduce bug**
`offline_diar_with_asr_infer.py`
```
from omegaconf import OmegaConf

from nemo.collections.asr.parts.utils.decoder_timestamps_utils import ASRDecoderTimeStamps
from nemo.collections.asr.parts.utils.diarization_utils import OfflineDiarWithASR
from nemo.core.config import hydra_runner
from nemo.utils import logging

import nemo.collections.asr as nemo_asr
@hydra_runner(config_path="../conf/inference", config_name="diar_infer_meeting.yaml")
def main(cfg):

    logging.info(f'Hydra config: {OmegaConf.to_yaml(cfg)}')

    # ASR inference for words and word timestamps
    asr_decoder_ts = ASRDecoderTimeStamps(cfg.diarizer)
    asr_model = nemo_asr.models.EncDecCTCModel.restore_from('/home/face/NeMo/examples/asr/exp/Conformer-CTC-Char-Aishell-100ep-lr0.9/2022-12-01_09-43-05/checkpoints/Conformer-CTC-Char-Aishell-100ep-lr0.9.nemo')
    #asr_model = asr_decoder_ts.set_asr_model()
    word_hyp, word_ts_hyp = asr_decoder_ts.run_ASR(asr_model)

    # Create a class instance for matching ASR and diarization results
    asr_diar_offline = OfflineDiarWithASR(cfg.diarizer)
    asr_diar_offline.word_ts_anchor_offset = asr_decoder_ts.word_ts_anchor_offset

    # Diarization inference for speaker labels
    diar_hyp, diar_score = asr_diar_offline.run_diarization(cfg, word_ts_hyp)
    trans_info_dict = asr_diar_offline.get_transcript_with_speaker_labels(diar_hyp, word_hyp, word_ts_hyp)

    # If RTTM is provided and DER evaluation
    if diar_score is not None:
        metric, mapping_dict, _ = diar_score

        # Get session-level diarization error rate and speaker counting error
        der_results = OfflineDiarWithASR.gather_eval_results(
            diar_score=diar_score,
            audio_rttm_map_dict=asr_diar_offline.AUDIO_RTTM_MAP,
            trans_info_dict=trans_info_dict,
            root_path=asr_diar_offline.root_path,
        )

        # Calculate WER and cpWER if reference CTM files exist
        wer_results = OfflineDiarWithASR.evaluate(
            hyp_trans_info_dict=trans_info_dict,
            audio_file_list=asr_diar_offline.audio_file_list,
            ref_ctm_file_list=asr_diar_offline.ctm_file_list,
        )

        # Print average DER, WER and cpWER
        OfflineDiarWithASR.print_errors(der_results=der_results, wer_results=wer_results)

        # Save detailed session-level evaluation results in `root_path`.
        OfflineDiarWithASR.write_session_level_result_in_csv(
            der_results=der_results,
            wer_results=wer_results,
            root_path=asr_diar_offline.root_path,
            csv_columns=asr_diar_offline.csv_columns,
        )


if __name__ == '__main__':
    main()
```
`diar_infer_meeting.yaml`
```
name: &name "ClusterDiarizer"

num_workers: 4
sample_rate: 16000
batch_size: 64

diarizer:
  manifest_filepath: /home/face/NeMo/examples/speaker_tasks/diarization/manifest_Ali_far.json
  out_dir: output_Ali_far
  oracle_vad: False # If True, uses RTTM files provided in the manifest file to get speech activity (VAD) timestamps
  collar: 0.25 # Collar value for scoring
  ignore_overlap: True # Consider or ignore overlap segments while scoring

  vad:
    model_path:  vad_multilingual_marblenet # .nemo local model path or pretrained VAD model name 
    external_vad_manifest: null # This option is provided to use external vad and provide its speech activity labels for speaker embeddings extraction. Only one of model_path or external_vad_manifest should be set

    parameters: # Tuned parameters for CH109 (using the 11 multi-speaker sessions as dev set) 
      window_length_in_sec: 0.63  # Window length in sec for VAD context input 
      shift_length_in_sec: 0.01 # Shift length in sec for generate frame level VAD prediction
      smoothing: False # False or type of smoothing method (eg: median)
      overlap: 0.5 # Overlap ratio for overlapped mean/median smoothing filter
      onset: 0.9 # Onset threshold for detecting the beginning and end of a speech 
      offset: 0.5 # Offset threshold for detecting the end of a speech
      pad_onset: 0 # Adding durations before each speech segment 
      pad_offset: 0 # Adding durations after each speech segment 
      min_duration_on: 0 # Threshold for small non_speech deletion
      min_duration_off: 0.6 # Threshold for short speech segment deletion
      filter_speech_first: True 

  speaker_embeddings:
    model_path: /home/face/NeMo/examples/speaker_tasks/diarization/spk_model/TitaNet-Finetune-encoder-cn2-300-adjust.nemo # .nemo local model path or pretrained model name (titanet_large, ecapa_tdnn or speakerverification_speakernet)
    parameters:
      window_length_in_sec: [3.0,2.5,2.0,1.5,1.0,0.5] # Window length(s) in sec (floating-point number). either a number or a list. ex) 1.5 or [1.5,1.0,0.5]
      shift_length_in_sec: [1.5,1.25,1.0,0.75,0.5,0.25] # Shift length(s) in sec (floating-point number). either a number or a list. ex) 0.75 or [0.75,0.5,0.25]
      multiscale_weights: [1,1,1,1,1,1] # Weight for each scale. should be null (for single scale) or a list matched with window/shift scale count. ex) [0.33,0.33,0.33]
      save_embeddings: True # If True, save speaker embeddings in pickle format. This should be True if clustering result is used for other models, such as `msdd_model`.
  
  clustering:
    parameters:
      oracle_num_speakers: False # If True, use num of speakers value provided in manifest file.
      max_num_speakers: 8 # Max number of speakers for each recording. If an oracle number of speakers is passed, this value is ignored.
      enhanced_count_thres: 80 # If the number of segments is lower than this number, enhanced speaker counting is activated.
      max_rp_threshold: 0.25 # Determines the range of p-value search: 0 < p <= max_rp_threshold. 
      sparse_search_volume: 30 # The higher the number, the more values will be examined with more time. 
      maj_vote_spk_count: False  # If True, take a majority vote on multiple p-values to estimate the number of speakers.
  
  msdd_model:
    model_path: ??? # .nemo local model path or pretrained model name for multiscale diarization decoder (MSDD)
    parameters:
      use_speaker_model_from_ckpt: True # If True, use speaker embedding model in checkpoint. If False, the provided speaker embedding model in config will be used.
      infer_batch_size: 25 # Batch size for MSDD inference. 
      sigmoid_threshold: [0.7] # Sigmoid threshold for generating binarized speaker labels. The smaller the more generous on detecting overlaps.
      seq_eval_mode: False # If True, use oracle number of speaker and evaluate F1 score for the given speaker sequences. Default is False.
      split_infer: True # If True, break the input audio clip to short sequences and calculate cluster average embeddings for inference.
      diar_window_length: 50 # The length of split short sequence when split_infer is True.
      overlap_infer_spk_limit: 5 # If the estimated number of speakers are larger than this number, overlap speech is not estimated.
  
  asr:
    model_path: stt_en_conformer_ctc_large # Provide NGC cloud ASR model name. stt_en_conformer_ctc_* models are recommended for diarization purposes.
    parameters:
      asr_based_vad: True # if True, speech segmentation for diarization is based on word-timestamps from ASR inference.
      asr_based_vad_threshold: 100 # Threshold (in sec) that caps the gap between two words when generating VAD timestamps using ASR based VAD.
      asr_batch_size: null # Batch size can be dependent on each ASR model. Default batch sizes are applied if set to null.
      decoder_delay_in_sec: null # Native decoder delay. null is recommended to use the default values for each ASR model.
      word_ts_anchor_offset: null # Offset to set a reference point from the start of the word. Recommended range of values is [-0.05  0.2]. 
      word_ts_anchor_pos: "start" # Select which part of the word timestamp we want to use. The options are: 'start', 'end', 'mid'.
      fix_word_ts_with_VAD: False # Fix the word timestamp using VAD output. You must provide a VAD model to use this feature.
      colored_text: False # If True, use colored text to distinguish speakers in the output transcript.
      print_time: True # If True, the start and end time of each speaker turn is printed in the output transcript.
      break_lines: False # If True, the output transcript breaks the line to fix the line width (default is 90 chars)
    
    ctc_decoder_parameters: # Optional beam search decoder (pyctcdecode)
      pretrained_language_model: null # KenLM model file: .arpa model file or .bin binary file.
      beam_width: 32
      alpha: 0.5
      beta: 2.5

    realigning_lm_parameters: # Experimental feature
      arpa_language_model: null # Provide a KenLM language model in .arpa format.
      min_number_of_words: 3 # Min number of words for the left context.
      max_number_of_words: 10 # Max number of words for the right context.
      logprob_diff_threshold: 1.2  # The threshold for the difference between two log probability values from two hypotheses.


```

**Environment overview**

- Environment location: Bare-metal
- Method of NeMo install: From source

**Environment details**
- NeMo toolkit: 1.13.0rc0
- OS version: Ubuntu 20.04.4 LTS
- PyTorch version: pytorch-cuda 11.6
- Python version: 3.8

**Additional context**

GPU: GeForce RTX 2080 Ti
