[QUARANTINE] [nightly] Release Deploy key creation user adds a deploy key

What does this MR do?

Quarantines the test Release Deploy key creation user adds a deploy key (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/6_release/deploy_key/add_deploy_key_spec.rb#L6)

This test has been found by Confiner to have failed 10 times, which exceeds the threshold of 3 times.

1. ce:update
2. ee:update
3. ee-previous-to-ce:update
4. ce:upgrade
5. ce:instance-image
6. ee:instance-image
7. ce:instance-image-slow-network
8. ee:instance-image-slow-network
9. ce:nplus1-instance-image
10. ee:nplus1-instance-image

#367416 (closed)

(This MR was automatically generated by Confiner at 2022-07-11 01:18:14 UTC)