[QUARANTINE] Verify Pipeline editor when CI has valid syntax shows valid validations

What does this MR do?

Quarantines the test Verify Pipeline editor when CI has valid syntax shows valid validations (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/4_verify/pipeline/pipeline_editor_lint_spec.rb#L50)

This test has been found by Confiner to have failed 4 times, which exceeds the threshold of 3 times.

1. ee:instance-parallel
2. ee:relative_url-parallel
3. ee:update-parallel
4. ee:praefect-parallel

#355377 (closed)

(This MR was automatically generated by Confiner at 2022-03-17 01:18:26 UTC)