[MPS] Update MPS documentation; add helper script to build mps_executor_runner

[DenisVieriu97]

Summary of changes:

• Update MPS documentation to reflect all changes since previous release
• Add helper script to build mps_executor_runner

Testing:

• Verified that mps_executor_runner builds correctly:

./examples/apple/mps/scripts/build_mps_executor_runner.sh
/examples/apple/mps/scripts/build_mps_executor_runner.sh --Debug

Verified that the docs are building correctly:

cd docs
make html

cc @shoumikhin, @cccclai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3324

• 📄 Preview Python docs built from this PR

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

❌ 1 New Failure

As of commit b1f33d3 with merge base 727a68d ():

NEW FAILURE - The following job has failed:

• Apple / upload-frameworks-ios (gh)
  Credentials could not be loaded, please check your action inputs: Could not load credentials from any providers

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[facebook-github-bot]

@cccclai has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@cccclai merged this pull request in 453ebad.