[QUARANTINE] Manage LDAP Group sync user filter method has LDAP users synced

What does this MR do?

Quarantines the test Manage LDAP Group sync user filter method has LDAP users synced (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/ee/browser_ui/1_manage/group/group_ldap_sync_spec.rb#L85)

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

#375818 (closed)

(This MR was automatically generated by Confiner at 2022-10-01 01:58:42 UTC)