[QUARANTINE] Create File Locking when refactor_blob_viewer is enabled creates a merge request and fails to merge

What does this MR do?

Quarantines the test Create File Locking when refactor_blob_viewer is enabled creates a merge request and fails to merge (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/ee/browser_ui/3_create/repository/file_locking_spec.rb#L100)

This test has been found by Confiner to have failed 4 times, which exceeds the threshold of 3 times.

1. ee:instance-parallel
2. ee:relative_url-parallel
3. ee:update-parallel
4. ee:praefect-parallel

#355624 (closed)

(This MR was automatically generated by Confiner at 2022-04-13 01:35:18 UTC)