[ExecuTorch] Complete Muse Glimmer rename

[digantdesai]

Update remaining comments and test documentation

[pytorch-bot]

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❌ 1 Unclassified Failure

As of commit dedcc5b with merge base ed65b12 ():

UNCLASSIFIED FAILURE - DrCI could not classify the following job because the workflow did not run on the merge base. The failure may be pre-existing on trunk or introduced by this PR:

• MLX / backend-tester (models) / test-mlx-backend-models (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1

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[Copilot]

Pull request overview

This PR finishes the “Muse Glimmer” rename cleanup by updating remaining test/doc comments that still referenced legacy “Onyx” terminology in the Muse Glimmer example + runtime.

Changes:

• Update Muse Glimmer vision test documentation/comments to reference MuseGlimmerVisionEncoder consistently.
• Refresh prompt-golden / prompt contract documentation in the Muse Glimmer test helpers.
• Update a runtime runner comment to reference MuseGlimmerConfig instead of OnyxConfig.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
examples/models/muse-glimmer/tests/test_vision_tower.py	Updates docstring/comments to Muse Glimmer terminology in the vision encoder unit tests.
examples/models/muse-glimmer/tests/test_vision_precompute.py	Updates test docstring + inline reference comment to Muse Glimmer naming.
examples/models/muse-glimmer/tests/prompt_cases.py	Updates prompt-contract comment for image patch token formatting.
examples/models/muse-glimmer/tests/gen_prompt_golden.py	Removes a large “re-validating after regeneration” doc section from the module docstring.
examples/models/muse-glimmer/runtime/runners/solo.cpp	Updates a comment to reference Muse Glimmer config naming.

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