Make LinearAdapter a nn.Linear child to maintain ckpt structure
State: closed | Pull request: yes
Labels: name: CI

name: Run CICD

# What does this PR do ?

Changes:
1. Make LinearAdapter a nn.Linear child -> so that when we swap it in to replace a nn.Linear the .weight and .bias attributes remain the same, therefore maintaining the checkpoint keys name path.
2. make LinearAdapter work with FSDPv1
 
**Collection**: [Note which collection this PR will affect]

# Changelog 
- Add specific line by line info of high level changes in this PR.

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# Additional Information
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[🤖]: Hi @akoumpa 👋,

We wanted to let you know that a [CICD pipeline](https://github.com/NVIDIA/NeMo/actions/runs/12403099852) 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

<!-- pylint-output-strict-mode-false -->

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

```
************* Module hf
examples/llm/peft/hf.py:26:0: C0301: Line too long (184/119) (line-too-long)
examples/llm/peft/hf.py:22:0: C0116: Missing function or method docstring (missing-function-docstring)
examples/llm/peft/hf.py:61:0: C0116: Missing function or method docstring (missing-function-docstring)
examples/llm/sft/hf.py:90:0: C0301: Line too long (162/119) (line-too-long)
************* Module nemo.collections.llm.peft.lora
nemo/collections/llm/peft/lora.py:147:4: C0116: Missing function or method docstring (missing-function-docstring)

-----------------------------------
Your code has been rated at 9.86/10
```

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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
* To disable multiple functions/methods at once, put a `# pylint: disable=C0116` before the first and a `# pylint: enable=C0116` after the last.

By applying these rules, we reduce the occurance of this message in future.

Thank you for improving NeMo's documentation!

<!-- 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 hf
examples/llm/peft/hf.py:26:0: C0301: Line too long (184/119) (line-too-long)
examples/llm/peft/hf.py:22:0: C0116: Missing function or method docstring (missing-function-docstring)
examples/llm/peft/hf.py:61:0: C0116: Missing function or method docstring (missing-function-docstring)
examples/llm/sft/hf.py:90:0: C0301: Line too long (162/119) (line-too-long)
************* Module nemo.collections.llm.peft.lora
nemo/collections/llm/peft/lora.py:147:4: C0116: Missing function or method docstring (missing-function-docstring)

-----------------------------------
Your code has been rated at 9.86/10
```

---

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
* To disable multiple functions/methods at once, put a `# pylint: disable=C0116` before the first and a `# pylint: enable=C0116` after the last.

By applying these rules, we reduce the occurance of this message in future.

Thank you for improving NeMo's documentation!

[🤖]: Hi @akoumpa 👋,

We wanted to let you know that a [CICD pipeline](https://github.com/NVIDIA/NeMo/actions/runs/12435908385) 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