[QUARANTINE] [nightly] Plan Design Management user adds a design and modifies it

What does this MR do?

Quarantines the test Plan Design Management user adds a design and modifies it (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/2_plan/design_management/modify_design_content_spec.rb#L17)

This test has been found by Confiner to have failed 36 times, which exceeds the threshold of 3 times.

1. ce:upgrade
2. ce:airgapped
3. ee:airgapped
4. ce:instance-image
5. ee:instance-image
6. ce:instance-image-slow-network
7. ee:instance-image-slow-network
8. ce:nplus1-instance-image
9. ee:nplus1-instance-image
10. ce:upgrade
11. ce:airgapped
12. ee:airgapped
13. ce:instance-image
14. ee:instance-image
15. ce:instance-image-slow-network
16. ee:instance-image-slow-network
17. ce:nplus1-instance-image
18. ee:nplus1-instance-image
19. ce:upgrade
20. ce:airgapped
21. ee:airgapped
22. ce:instance-image
23. ee:instance-image
24. ce:instance-image-slow-network
25. ee:instance-image-slow-network
26. ce:nplus1-instance-image
27. ee:nplus1-instance-image
28. ce:upgrade
29. ce:airgapped
30. ee:airgapped
31. ce:instance-image
32. ee:instance-image
33. ce:instance-image-slow-network
34. ee:instance-image-slow-network
35. ce:nplus1-instance-image
36. ee:nplus1-instance-image

#407479 (closed)

(This MR was automatically generated by Confiner at 2023-04-19 01:18:35 UTC)