[material_ui] Remove no-shuffle from progress indicator test

[ValentinVignal]

Part of flutter/flutter#85160

Port of flutter/flutter#186655

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[gemini-code-assist]

Code Review

This pull request removes the 'no-shuffle' tag and its associated explanatory comment from the progress_indicator_test.dart file, allowing the test suite to run with randomized ordering. There are no review comments, and I have no feedback to provide.

[justinmc]

LGTM 👍 . This doesn't need a pending changelog file since it only affects a test. There was a test failure but it was a timeout, I've rerun it.

[auto-submit]

autosubmit label was removed for flutter/packages/12505, because - The status or check suite Dashboard Checks has failed. Please fix the issues identified (or deflake) before re-applying this label.