Quarantine end-to-end test

Quarantine Create new merge request from the event notification after a push via the API creates a merge request

qa/qa/specs/features/browser_ui/3_create/merge_request/create_merge_request_from_push_notification_spec.rb

@@ -35,6 +35,10 @@ module QA
 
       it(
         'after a push via the API creates a merge request',
+        quarantine: {
+          issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/403182',
+          type: :flaky
+        },
         testcase: 'https://gitlab.com/gitlab-org/gitlab/-/quality/test_cases/360490'
       ) do
         commit = create(:commit,