Modify sharding logic

[svekars]

Use Sphinx-Gallery's native filename_pattern (driven by the existing FILES_TO_RUN env var) instead of mutating source files to control CI sharding. Also cleans up stale aws_distributed_training_tutorial references.

Deleted:

• .jenkins/remove_runnable_code.py
• .jenkins/delete_html_file_with_runnable_code_removed.py (was dead code)
• .jenkins/get_sphinx_filenames.py (no longer needed)

Test plan:

• CI: FILES_TO_RUN → conf.py builds filename_pattern → only shard tutorials execute
• Local: no FILES_TO_RUN set → all tutorials execute (unchanged behavior)
• GALLERY_PATTERN for single-tutorial dev builds still works

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3767

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 7 New Failures, 3 Cancelled Jobs

As of commit 68c67e0 with merge base 6e608db ():

NEW FAILURES - The following jobs have failed:

• Build tutorials / build / pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• Build tutorials / build / pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• Build tutorials / build / pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• Build tutorials / build / pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• Build tutorials / build / pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• Build tutorials / build / pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  Process completed with exit code 2.
• link check on PR / linkChecker (gh)
  Process completed with exit code 1.

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

• Build tutorials / build / pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  ##[error]The operation was canceled.
• Build tutorials / build / pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  ##[error]The operation was canceled.
• Build tutorials / build / pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu) (gh)
  ##[error]The operation was canceled.

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