Unified dynamo graph capture impl.

[zhxchen17]

Differential Revision: D84664020

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/165493

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❌ 2 New Failures

As of commit 564db4f with merge base e7091a4 ():

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner-mypy-partial / linux-job (gh)
  >>> Lint for torch/_dynamo/functional_export.py:
• Lint / lintrunner-noclang-partial / linux-job (gh)
  >>> Lint for test/distributed/tensor/test_dtensor_export.py:

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[meta-codesync]

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