- Added `showcase` as an explicit collection task in the testing framework, distinct from product regression.
- Introduced explicit collection task rules and updated documentation to reflect changes in testing structure.
- Updated E2E testing commands to utilize `--execution-profile` for better control over test execution.
- Implemented validation to prevent the selection of certain groups (e.g., `showcase`) during release command parsing.
- Enhanced regression selection logic to allow opt-in groups for release impact assessment while rejecting disallowed groups.
- Updated related scripts and test cases to ensure compliance with new testing rules and execution profiles.