[QUARANTINE] [nightly] Create Add a directory in Web IDE when user adds a new empty directory shows successfully but not able to be committed

What does this MR do?

Quarantines the test Create Add a directory in Web IDE when user adds a new empty directory shows successfully but not able to be committed (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/browser_ui/3_create/web_ide/add_new_directory_in_web_ide_spec.rb#L54)

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

#407141 (closed)

(This MR was automatically generated by Confiner at 2023-04-15 01:17:53 UTC)