Core ML doc updates

[metascroy]

Splits previous docs (docs/source/backends-coreml.md) into multiple files following #14873

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15033

• 📄 Preview Python docs built from this PR

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

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• [ROCm][CI] Machines under the label linux.rocm.gpu.2 are undergoing maintenance.

❌ 3 New Failures, 14 Cancelled Jobs, 3 Unrelated Failures

As of commit 99dde90 with merge base a6a6dfb ():

NEW FAILURES - The following jobs have failed:

• pull / test-qnn-wheel-packages-linux (3.10) / linux-job (gh)
  RuntimeError: Command docker exec -t 2d03877242f87c59882383d3f90aed9307b386b03a399b15adc4b69aa45b2925 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.11) / linux-job (gh)
  RuntimeError: Command docker exec -t 82b25ce58cb03ebcc7d48da88f421395c0b88e437b81a6427df85d3d8cac2221 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.12) / linux-job (gh)
  RuntimeError: Command docker exec -t a3c05c3af2b03340c1eb9b18425efbc33bcec814128d5963d284ddb1f1da2597 /exec failed with exit code 1

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

• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-models-linux (ic4, portable, linux.4xlarge.memory) / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-models-linux (llama3_2_vision_encoder, portable, linux.4xlarge.memory) / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-models-linux (phi_4_mini, portable, linux.4xlarge.memory) / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  ##[error]The operation was canceled.
• pull / test-static-llama-qnn-linux / linux-job (gh)
• pull / unittest / linux / linux-job (gh)
• pull / unittest / macos / macos-job (gh)
• pull / unittest / windows / windows-job (gh)
• pull / unittest-arm-backend-with-no-fvp (test_pytest_models) / linux-job (gh)
  ##[error]The operation was canceled.
• pull / unittest-arm-backend-with-no-fvp (test_pytest_ops) / linux-job (gh)
• pull / unittest-buck / macos / macos-job (gh)
• pull / unittest-editable / linux / linux-job (gh)
  ##[error]The operation was canceled.
• pull / unittest-editable / macos / macos-job (gh)

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• pull / test-models-linux-basic (mv3, portable, buck2, linux.2xlarge, executorch-ubuntu-22.04-clang12) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-samsung-models-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (matched win rule in flaky-rules.json)
  ##[error]The operation was canceled.

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[github-actions]

This PR needs a release notes: label

If your change should be included in the release notes (i.e. would users of this library care about this change?), please use a label starting with release notes:. This helps us keep track and include your important work in the next release notes.

To add a label, you can comment to pytorchbot, for example
@pytorchbot label "release notes: none"

For more information, see
https://github.com/pytorch/pytorch/wiki/PyTorch-AutoLabel-Bot#why-categorize-for-release-notes-and-how-does-it-work.

[digantdesai]

something is off in the rendered docs, I don't see the CorML page in the left nav bar and the link in the table is also not working.

[metascroy]

something is off in the rendered docs, I don't see the CorML page in the left nav bar and the link in the table is also not working.

How do I see the rendered docs?

[mergennachin]

@metascroy

How do I see the rendered docs?

Click on the link above "Python docs built from this PR" in the pytorch-bot comment.

One tip, it doesn't always update on new code updates. The reason is the S3 is cached

So, you just add "?v=1" or any other strings to the URL to force reload

[metascroy]

Closing this PR. I re-opened a new one here: #15073