Un-quarantine Auto DevOps QA test

What does this MR do?

https://gitlab.com/gitlab-org/gitlab-ce/commit/63cbaa5e8e2830d16f8a0a3d56d66202fdcd2653 is definitively the fix for https://gitlab.com/gitlab-org/quality/nightly/issues/81#cause

Based on all the passes https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28662 and https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28689 (17x), I have high confidence this test is no longer flaky

Closes https://gitlab.com/gitlab-org/quality/nightly/issues/81

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

Performance and testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team