[QUARANTINE] Plan Sum of issues weights on issue board shows the sum of issues weights in the board list's header

What does this MR do?

Quarantines the test Plan Sum of issues weights on issue board shows the sum of issues weights in the board list's header (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/ee/browser_ui/2_plan/issue_boards/sum_of_issues_weights_spec.rb#L33)

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

1. e2e:package-and-test-results
2. e2e:package-and-test-results
3. e2e:package-and-test-results

#372906 (closed)

(This MR was automatically generated by Confiner at 2022-10-01 02:04:54 UTC)