Merge branch '391780-quarantine-tree_show_spec' into 'master'

Quarantine tree_show_spec.rb

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/112218



Merged-by: Jennifer Li <jli@gitlab.com>
Approved-by: Jennifer Li <jli@gitlab.com>
Co-authored-by: Nao Hashizume <nhashizume@gitlab.com>