Fix DistCP inference issue
<!-- pylint-output-strict-mode-false -->

beep boop 🤖: 🙏 The following files have warnings. In case you are familiar with these, please try helping us to improve the code base.

---

Your code was analyzed with PyLint. The following annotations have been identified:

```
************* Module nemo.collections.nlp.modules.common.text_generation_strategy
nemo/collections/nlp/modules/common/text_generation_strategy.py:438:0: C0301: Line too long (182/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:821:0: C0301: Line too long (133/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:916:0: C0301: Line too long (190/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:944:0: C0301: Line too long (137/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:945:0: C0301: Line too long (152/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:958:0: C0301: Line too long (136/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:961:0: C0301: Line too long (211/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:1016:0: C0301: Line too long (126/119) (line-too-long)
nemo/collections/nlp/modules/common/text_generation_strategy.py:70:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:270:0: C0115: Missing class docstring (missing-class-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:344:0: C0115: Missing class docstring (missing-class-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:420:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:585:0: C0115: Missing class docstring (missing-class-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:747:0: C0115: Missing class docstring (missing-class-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:828:0: C0115: Missing class docstring (missing-class-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:865:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:1047:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/collections/nlp/modules/common/text_generation_strategy.py:17:0: W0611: Unused import os (unused-import)

-----------------------------------
Your code has been rated at 9.60/10
```

---

Mitigation guide:

* Add sensible and useful docstrings to functions and methods
* For trivial methods like getter/setters, consider adding `# pylint: disable=C0116` inside the function itself
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By applying these rules, we reduce the occurance of this message in future.

Thank you for improving NeMo's documentation! [🤖]: Hi @suiyoubi 👋,

We wanted to let you know that a [CICD pipeline](https://github.com/NVIDIA/NeMo/actions/runs/12697072643) for this PR just finished successfully

So it might be time to merge this PR or get some approvals

I'm just a bot so I'll leave it you what to do next.

//cc @pablo-garay @ko3n1g
# What does this PR do ?

When training with latest mcore's dist ckpt format. the model.model will sometimes be a list and this breaks the inference. This PR fix this issue.
**Collection**: [Note which collection this PR will affect]

# Changelog 
- Add specific line by line info of high level changes in this PR.

# Usage
* You can potentially add a usage example below

```python
# Add a code snippet demonstrating how to use this 
```

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# Additional Information
* Related to # (issue)
