Unquarantine merge tests

What does this MR do?

Of the last 10 pipelines the only failures were due to https://gitlab.com/gitlab-org/gitlab-ce/issues/63101 (e.g.: https://gitlab.com/gitlab-org/quality/nightly/-/jobs/228743060), but otherwise the test passed, so I think this is safe to remove them from quarantine.

Closes https://gitlab.com/gitlab-org/quality/nightly/issues/94

Closes https://gitlab.com/gitlab-org/quality/nightly/issues/93

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