[QUARANTINE] Manage Project import imports a GitHub repo

What does this MR do?

Quarantines the test Manage Project import imports a GitHub repo (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/1_manage/project/import_github_repo_spec.rb#L41)

This test has been found by Confiner to have been failing for more than (or equal to) 3 times. This test has failed 4 times.

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

#351508 (closed)

(This MR was automatically generated by Confiner at 2022-02-02 01:17:48 UTC)