Enable async checkpointing for distributed recipes

[ankitageorge]

Context

What is the purpose of this PR? Is it to

• [x ] add a new feature
• fix a bug
• update tests and/or documentation
• other (please add here)

Please link to any issues this PR addresses.

Changelog

What are the changes made in this PR?

• Separate PRs have enabled distributed async checkpointing with DCP for intermediate checkpoints for full_finetune_distributed and dpo_distributed recipes. This does the same for the remaining distributed recipes.

Test plan

Please make sure to do each of the following if applicable to your PR. If you're unsure about any one of these just ask and we will happily help. We also have a contributing page for some guidance on contributing.

• [ x] run pre-commit hooks and linters (make sure you've first installed via pre-commit install)
• [ x] add unit tests for any new functionality
• update docstrings for any new or updated methods or classes
• [x ] run unit tests via pytest tests
• [x ] run recipe tests via pytest tests -m integration_test
• manually run any new or modified recipes with sufficient proof of correctness
• include relevant commands and any other artifacts in this summary (pastes of loss curves, eval results, etc.)

UX

If your function changed a public API, please add a dummy example of what the user experience will look like when calling it.
Here is a docstring example
and a tutorial example

• I did not change any public API
• I have added an example to docs or docstrings

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/torchtune/2660

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❌ 2 New Failures, 2 Cancelled Jobs

As of commit 5765fb3 with merge base 0991f97 ():

NEW FAILURES - The following jobs have failed:

• GPU tests / gpu_test (3.11, stable) (gh)
  tests/recipes/test_qat_lora_finetune_distributed.py::TestQATLoRAFinetuneDistributedRecipe::test_save_and_load_merged_weights[llama3/8B_qat_lora-llama3-tune]
• Lint / lint (3.10) (gh)
  tests/recipes/test_knowledge_distillation_distributed.py:298:5: F811 redefinition of unused 'test_training_state_on_resume_with_async_checkpointing' from line 206

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• GPU tests / gpu_test (3.10, stable) (gh)
  tests/recipes/test_qat_lora_finetune_distributed.py::TestQATLoRAFinetuneDistributedRecipe::test_save_and_load_merged_weights[llama3/8B_qat_lora-llama3-tune]
• GPU tests / gpu_test (3.9, stable) (gh)
  ##[error]The operation was canceled.

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