[QUARANTINE] Create File Locking creates a merge request and fails to merge

What does this MR do?

Quarantines the test Create File Locking 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#L66)

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

1. e2e:package-and-test-results
2. e2e:package-and-test-results
3. e2e:package-and-test-results

#375970 (closed)

(This MR was automatically generated by Confiner at 2022-10-01 02:03:03 UTC)