Fix scheduled review jobs

What does this MR do?

1. The scheduled review jobs weren't running because they were extending from both .only-review and .only-review-schedules but .only-review includes a except.refs: master which would prevent scheduled jobs from being created.
2. This also fixes/simplifies the *-tests-metadata jobs.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content