AttributeError: 'EncDecSpeakerLabelModel' object has no attribute 'get_label'
**Describe the bug**

I cannot get the language of a file with AmberNet

**Steps/Code to reproduce bug**

Code:

```python
import nemo 
from nemo.collections.asr.models import EncDecSpeakerLabelModel

model = EncDecSpeakerLabelModel.from_pretrained('langid_ambernet')

print('NeMO:', nemo.__version__)

print('AmberNet method:', model.get_label)
```

Result:

```
...

NeMO: 1.13.0

Traceback (most recent call last):
  File "/Users/yehorsmoliakov/Work/egorsmkv/asr-corpus-creator/rep.py", line 8, in <module>
    print('AmberNet method:', model.get_label)
  File "/Users/yehorsmoliakov/.local/share/virtualenvs/asr-corpus-creator-Sp_hMA78/lib/python3.9/site-packages/torch/nn/modules/module.py", line 1265, in __getattr__
    raise AttributeError("'{}' object has no attribute '{}'".format(
AttributeError: 'EncDecSpeakerLabelModel' object has no attribute 'get_label'
```

**Expected behavior**

Info about the method `get_label`

