Switch remainder of recipe tests over to HF format checkpoints

[adheep04]

Context

• [x] update tests by switching to hf format
• addresses #2816
• currently a draft (need to finish 4 more

Changelog

• Switched the formatting of the following recipe tests to hf format similar to issue #2815:
• test_knowledge_distillation_distributed.py
• test_knowledge_distillation_single_device.py
• test_lora_dpo_single_device.py
• test_lora_finetune_distributed.py
• test_lora_finetune_single_device.py
• test_qat_distributed.py
• test_qat_lora_finetune_distributed.py
• test_qat_single_device.py utils.py
• Added support for a lora/dora/qlora config for "llama3_hf_138m" in utils.py

Remaining recipes:

• test_eleuther_eval.py
• test_full_dpo_distributed.py
• test_ppo_full_finetune_single_device.py
• test_dpo_distributed.py

TODO

• [ ] complete remaining 4 recipe tests
• [ ] run unit tests via pytest tests
• [ ] run recipe tests via pytest tests -m integration_test

Questions/Notes

• I noticed in the fully-fine-tune tests, the tolerance changed from rtol=1e-4 to rtol=1e-3, I have not changed the rtol values in any of the recipes I changed, is this okay or should the tolerance threshold increase for the others too?
• I ran a few tests on my machine and got quite a few OOMs. Not sure if I will be able to change the expected loss so they are currently either commented out or marked with a "# TODO". I may need some help running the tests in case I'm unable to, however I could work around this by lowering the vocab size to fix this if that is okay?
• I committed an unfinished version of test_dpo_distributed on accident.

@krammnic Please let me know if you notice any bugs or errors or have any pointers for me. I should have the remaining recipes done within the next couple days, sorry again the long wait! life's been pretty crazy haha.

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/torchtune/2871

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[adheep04]

Completed

• all but 1 recipe

New TODO

• [ ] switch test_lora_dpo_distributed to hf format
• [ ] run tests and update expected losses (may need some help to run some tests in case of OOMs!)

[krammnic]

Hey! Thanks for the PR. I will review tomorrow