[QUARANTINE] [nightly] Create Add a directory in Web IDE when a directory with the same name already exists throws an error

What does this MR do?

Quarantines the test Create Add a directory in Web IDE when a directory with the same name already exists throws an error (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/3_create/web_ide_new/add_new_directory_in_web_ide_spec.rb#L40)

This test has been found by Confiner to have failed 4 times, which exceeds the threshold of 3 times.

1. ce:instance-image-slow-network
2. ee:instance-image-slow-network
3. ce:instance-image-slow-network
4. ee:instance-image-slow-network

#387609 (closed)

(This MR was automatically generated by Confiner at 2023-02-04 01:21:18 UTC)