llm performance scripts

[malay-nagda]

What does this PR do ?

Adds scripts for llm pre-training and fine-tuning, optimized for performance

Collection: [llm]

Changelog

Added arg params for HuggingFace Token, NEMO_HOME env var and fine-tuning scheme

-hf/--hf_token # needed for downloading checkpoints and tokenizers from HF
-nh/--nemo_home # needed for accessing locally stored checkpoints and tokenizers
-f/--finetuning # 'lora' or 'sft'. default is 'lora' 

Usage

python3 scripts/llm/performance/pretrain_llama3_8b.py -a <slurm_account> -p <slurm_partition>

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[github-actions]

[🤖]: Hi @malay-nagda 👋,

We wanted to let you know that a CICD pipeline 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

[github-actions]

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.tokenizer_utils
nemo/collections/nlp/modules/common/tokenizer_utils.py:73:0: C0301: Line too long (199/119) (line-too-long)
nemo/collections/nlp/modules/common/tokenizer_utils.py:96:0: C0301: Line too long (149/119) (line-too-long)
nemo/collections/nlp/modules/common/tokenizer_utils.py:131:0: C0301: Line too long (146/119) (line-too-long)
nemo/collections/nlp/modules/common/tokenizer_utils.py:233:0: C0301: Line too long (146/119) (line-too-long)
nemo/collections/nlp/modules/common/tokenizer_utils.py:42:0: C0115: Missing class docstring (missing-class-docstring)

-----------------------------------
Your code has been rated at 9.50/10

---

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!