Merge branch 'qa-add-assignee-wait' into 'master'

Add wait to e2e assignee check

See merge request gitlab-org/gitlab!46563

qa/qa/page/component/issuable/sidebar.rb

@@ -65,7 +65,9 @@ module QA
 
           def has_assignee?(username)
             within_element(:assignee_block) do
-              has_text?(username)
+              wait_until(reload: false) do
+                has_text?(username)
+              end
             end
           end