Add MCore FSDP2 support 
State: open | Pull request: yes
Labels: name: feature

name: Run CICD

# What does this PR do ?

Add MCore FSDP2 support

**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 
```

# GitHub Actions CI

The Jenkins CI system has been replaced by GitHub Actions self-hosted runners.

The GitHub Actions CI will run automatically when the "Run CICD" label is added to the PR.
To re-run CI remove and add the label again.
To run CI on an untrusted fork, a NeMo user with write access must first click "Approve and run".

# Before your PR is "Ready for review"
**Pre checks**:
- [ ] Make sure you read and followed [Contributor guidelines](https://github.com/NVIDIA/NeMo/blob/main/CONTRIBUTING.md)
- [ ] Did you write any new necessary tests?
- [ ] Did you add or update any necessary documentation?
- [ ] Does the PR affect components that are optional to install? (Ex: Numba, Pynini, Apex etc)
  - [ ] Reviewer: Does the PR have correct import guards for all optional libraries?
  
**PR Type**:
- [x] New Feature
- [ ] Bugfix
- [ ] Documentation

If you haven't finished some of the above items you can still open "Draft" PR.


## Who can review?

Anyone in the community is free to review the PR once the checks have passed. 
[Contributor guidelines](https://github.com/NVIDIA/NeMo/blob/main/CONTRIBUTING.md) contains specific people who can review PRs to various areas.

# Additional Information
* Related to # (issue)


This PR is stale because it has been open for 14 days with no activity. Remove stale label or comment or update or this will be closed in 7 days.

This PR is stale because it has been open for 14 days with no activity. Remove stale label or comment or update or this will be closed in 7 days.

<!-- 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.lightning.megatron_parallel
nemo/lightning/megatron_parallel.py:261:0: C0301: Line too long (127/119) (line-too-long)
nemo/lightning/megatron_parallel.py:262:0: C0301: Line too long (140/119) (line-too-long)
nemo/lightning/megatron_parallel.py:263:0: C0301: Line too long (130/119) (line-too-long)
nemo/lightning/megatron_parallel.py:569:0: C0301: Line too long (129/119) (line-too-long)
nemo/lightning/megatron_parallel.py:576:0: C0301: Line too long (135/119) (line-too-long)
nemo/lightning/megatron_parallel.py:904:0: C0301: Line too long (137/119) (line-too-long)
nemo/lightning/megatron_parallel.py:1134:0: C0301: Line too long (136/119) (line-too-long)
nemo/lightning/megatron_parallel.py:1707:0: C0301: Line too long (128/119) (line-too-long)
nemo/lightning/megatron_parallel.py:1746:0: C0301: Line too long (146/119) (line-too-long)
nemo/lightning/megatron_parallel.py:75:0: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:76:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:78:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:113:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:117:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:329:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:353:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:379:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:405:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:541:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:584:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:588:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:656:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:691:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:697:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:703:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:710:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:717:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:751:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:759:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:775:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:802:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:814:0: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:836:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:845:4: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:874:8: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1400:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1575:0: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:1581:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1587:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1591:4: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1596:0: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:1601:0: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:1629:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1675:8: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1697:0: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:1770:0: C0115: Missing class docstring (missing-class-docstring)
nemo/lightning/megatron_parallel.py:1813:0: C0116: Missing function or method docstring (missing-function-docstring)
nemo/lightning/megatron_parallel.py:1827:0: C0116: Missing function or method docstring (missing-function-docstring)
************* Module nemo.lightning.pytorch.strategies.megatron_strategy
nemo/lightning/pytorch/strategies/megatron_strategy.py:143:0: C0301: Line too long (121/119) (line-too-long)
nemo/lightning/pytorch/strategies/megatron_strategy.py:315:4: C0116: Missing function or method docstring (missing-function-docstring)

-----------------------------------
Your code has been rated at 9.56/10
```

---

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!