Patch transcribe_util for steaming mode and add wer calculation back to inference scripts
# What does this PR do ?

Patch transcribe_util for steaming mode and add wer calculation back to the inference scripts as requested

**Collection**: ASR

# Changelog 
- Patch `decoding` in `write_transcription`
- Temporarily set `decoding.beam.return_best_hypothesis = True` to true to be written to manifest to avoid`assert`, see in [discussion](https://github.com/NVIDIA/NeMo/pull/6063/files#r1178635367) @karpnv. May need to come up a better way for ngram/beam
- Add wer calculation back to
 `transcribe_speech.py`,
 `speech_to_text_buffered_infer_ctc`,
 `speech_to_text_buffered_infer_rnnt` as requested, but I still recommand to use asr evaluator and simply those inference script if possible. 
- Reflect changed in ASR evaluator 
# Usage
```python
python transcribe_speech.py \
    model_path=xxxx \
    dataset_manifest=xxx\
    clean_groundtruth_text=True \
    langid='zh' \
    use_cer=True \
    calculate_wer=True

[NeMo I 2023-05-08 15:43:25 transcribe_speech:360] Writing prediction and error rate of each sample to xxxx
[NeMo I 2023-05-08 15:43:25 transcribe_speech:361] {'samples': 2, 'tokens': 164, 'wer': 0.04878048780487805, 'ins_rate': 0.0, 'del_rate': 0.04878048780487805, 'sub_rate': 0.0}

```

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# Additional Information
* Related to[PR#6559](https://github.com/NVIDIA/NeMo/pull/6559)