[QUARANTINE] [nightly] Create Codeowners merge request assigns code owners as approvers

What does this MR do?

Quarantines the test Create Codeowners merge request assigns code owners as approvers (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/ee/browser_ui/3_create/repository/assign_code_owners_spec.rb#L28)

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

1. ee:update
2. ce:upgrade
3. ee:instance-image-slow-network
4. ee:nplus1-instance-image

#387081 (closed)

(This MR was automatically generated by Confiner at 2023-03-16 01:17:45 UTC)