[Issue] Replace repetitive actions with Action Groups in AdminCreateInactiveFlatCategoryTest and AdminUpdateFlatCategoryAndAddProductsTest

[m2-assistant]

This issue is automatically created based on existing pull request: #34470: Replace repetitive actions with Action Groups in AdminCreateInactiveFlatCategoryTest and AdminUpdateFlatCategoryAndAddProductsTest

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Description (*)

Related Pull Requests

Fixed Issues (if relevant)

Tests are refactored according to the best practices followed by MFTF.

Manual testing scenarios (*)

Run test locally

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)