[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.