Move quarantine tag to outer description block
What does this MR do?
This should fix instances such as
- https://gitlab.com/gitlab-org/quality/nightly/-/jobs/495286497#L8261
- https://gitlab.com/gitlab-org/quality/nightly/-/jobs/495353026#L6735
- https://gitlab.com/gitlab-org/quality/nightly/-/jobs/495352995#L8162
where the before block was being called.
This is documented in the Quarantining tests section of our handbook https://about.gitlab.com/handbook/engineering/quality/guidelines/debugging-qa-test-failures/#quarantining-tests
Closes #213280 (closed)