[QUARANTINE] [nightly] Verify Group runner registration user registers a new group runner

What does this MR do?

Quarantines the test Verify Group runner registration user registers a new group runner (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/4_verify/runner/register_group_runner_spec.rb#L19)

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

1. ee:airgapped
2. ce:upgrade
3. ee:airgapped

#410076 (closed)

(This MR was automatically generated by Confiner at 2023-05-09 01:18:01 UTC)