Dequarantines merge_mr_when_pipline_is_blocked_spec

What does this MR do and why?

The spec was failing because the group hit CI/CD minute limit of 400 mins. The limit has been lifted and all groups used by the test now have unlimited minutes. Since that's resolved now, this spec is being dequarantined.

Pipeline Results: http://gitlab-qa-allure-reports.s3.amazonaws.com/e2e-package-and-test/g379747-dequarantine-spec/760024861/index.html#suites/0fdfbafa36004f4c92f8a488b02e4915/c6db635f7063c60a/

• ✅ ee:instance
• ✅ ee:relative-url
• ✅ ee:decomposition-single-db
• ✅ ee:praefect
• ✅ ee:decomposition-multiple-db

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.