[WIP] [DO NOT LAND] Everything is transform + merge instruct/chat

[RdoubleA]

Context

What is the purpose of this PR? Is it to

• 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?

Test plan

Please make sure to do each of the following if applicable to your PR. (If you're not sure about any one of these just ask and we will happily help.)

• run pre-commit hooks and linters (make sure you've first installed via pre-commit install)
• add unit tests for any new functionality
• update docstrings for any new or updated methods or classes
• run unit tests via pytest tests
• 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.)

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/torchtune/1106

• 📄 Preview Python docs built from this PR

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❌ 6 New Failures, 7 Cancelled Jobs

As of commit 5760268 with merge base ef6e196 ():

NEW FAILURES - The following jobs have failed:

• Build Docs / build_docs (3.11) (gh)
• Multi-GPU Recipe Tests / recipe_test_multi_gpu (3.8, stable) (gh)
  Process completed with exit code 2.
• Recipe Tests / recipe_test (3.10) (gh)
  Process completed with exit code 2.
• Recipe Tests / recipe_test (3.11) (gh)
  Process completed with exit code 2.
• Unit Test / unit_tests (3.8) (gh)
  Process completed with exit code 2.
• Unit Test / unit_tests (3.9) (gh)
  Process completed with exit code 2.

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

• Multi-GPU Recipe Tests / recipe_test_multi_gpu (3.10, stable) (gh)
  ##[error]The operation was canceled.
• Multi-GPU Recipe Tests / recipe_test_multi_gpu (3.11, stable) (gh)
  ##[error]The operation was canceled.
• Multi-GPU Recipe Tests / recipe_test_multi_gpu (3.9, stable) (gh)
  ##[error]The operation was canceled.
• Recipe Tests / recipe_test (3.8) (gh)
• Recipe Tests / recipe_test (3.9) (gh)
• Unit Test / unit_tests (3.10) (gh)
• Unit Test / unit_tests (3.11) (gh)
  ##[error]The operation was canceled.

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