[QUARANTINE] [nightly] Create Merge requests when merging several times behaves like merge when pipeline succeeds merges after pipeline succeeds

What does this MR do?

Quarantines the test Create Merge requests when merging several times behaves like merge when pipeline succeeds merges after pipeline succeeds (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/3_create/merge_request/merge_when_pipeline_succeeds_spec.rb#L106)

This test has been found by Confiner to have failed 12 times, which exceeds the threshold of 3 times.

1. ce:airgapped
2. ee:instance-image-transient-bug-tests-slow
3. ce:airgapped
4. ee:airgapped
5. ce:instance-image-transient-bug-tests
6. ee:instance-image-transient-bug-tests-slow
7. ee:airgapped
8. ee:instance-image-transient-bug-tests
9. ee:instance-image-transient-bug-tests-slow
10. ee:airgapped
11. ee:instance-image-transient-bug-tests
12. ee:instance-image-transient-bug-tests-slow

#398113 (closed)

(This MR was automatically generated by Confiner at 2023-03-22 01:17:36 UTC)