Merge branch 'mk/unflake-unassign-test' into 'master'

Unflake unassign test

Closes #32621

See merge request gitlab-org/gitlab!17627

spec/features/issues_spec.rb

@@ -470,6 +470,8 @@ describe 'Issues' do
             expect(page).to have_content 'None'
           end
 
+          wait_for_requests
+
           expect(issue.reload.assignees).to be_empty
         end