[QUARANTINE] [nightly] Manage User can be followed and their activity seen

What does this MR do?

Quarantines the test Manage User can be followed and their activity seen (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/1_manage/user/follow_user_activity_spec.rb#L71)

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

1. ee:update
2. ee:instance-image
3. ee:instance-image-slow-network

#396617 (closed)

(This MR was automatically generated by Confiner at 2023-03-16 01:17:48 UTC)