[material_ui, cupertino_ui] Rename l10n macros

[dkwingsmt]

This PR renames macros used by l10n.

For why the rename is needed, see #12198.

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[flutter-dashboard]

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[gemini-code-assist]

Code Review

This pull request updates the documentation macro names for Cupertino and Material localizations from 'flutter.localizations.' to 'cupertino_ui.localizations.' and 'material_ui.localizations.*'. However, the generated Material localizations file is missing the corresponding macro rename, which should be updated to prevent out-of-sync documentation templates.

[QuncCccccc]

LGTM

[auto-submit]

autosubmit label was removed for flutter/packages/12211, because - The status or check suite Dashboard Checks has failed. Please fix the issues identified (or deflake) before re-applying this label.