Prevent duplicate errors with multiple file widget

Modified the 'inline_form_errors_preprocess_details' function to avoid the duplication of errors when 'file_widget_multiple' is used.

refactor(claro theme): remove error duplication check

Removed the check for error duplication in 'claro.theme'. The issue has been resolved in the 'inline_form_errors' module.

Closes #3084906

added 70 commits

• f298f84d...c1708b32 - 68 commits from branch project:11.x
• 9ce1a96d - Prevent duplicate errors with multiple file widget
• 541bbe42 - Added tests

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• 709cf18c - Testing with multiple themes

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• 826a02c8 - Phpstan fixes

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• ac8b0ec8 - Running tests on multiple themes

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