[QUARANTINE] Manage standard when admin approval is not required behaves like registration and login allows the user to registers and login

What does this MR do?

Quarantines the test Manage standard when admin approval is not required behaves like registration and login allows the user to registers and login (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/1_manage/login/register_spec.rb#L96)

This test has been found by Confiner to have been failing for more than (or equal to) 3 times. This test has failed 12 times.

1. ee:instance-parallel
2. ee:relative_url-parallel
3. ee:update-parallel
4. ee:praefect-parallel
5. ee:instance-parallel
6. ee:relative_url-parallel
7. ee:update-parallel
8. ee:praefect-parallel
9. ee:instance-parallel
10. ee:instance-parallel
11. ee:instance-parallel
12. ee:instance-parallel

#349625 (closed)

(This MR was automatically generated by Confiner at 2022-01-07 20:29:06 UTC)