Merge branch 'do-not-block-project-when-wiki-repository-is-broken' into 'master'

Use a friendlier error message when wiki repository is broken

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/117270



Merged-by: John Mason <9717668-john-mason@users.noreply.gitlab.com>
Approved-by: Rudy Crespo <rcrespo@gitlab.com>
Approved-by: Aakriti Gupta <agupta@gitlab.com>
Approved-by: Anna Vovchenko <avovchenko@gitlab.com>
Approved-by: John Mason <9717668-john-mason@users.noreply.gitlab.com>
Reviewed-by: Kassio Borges <kborges@gitlab.com>
Reviewed-by: Aakriti Gupta <agupta@gitlab.com>
Co-authored-by: ngala <ngala@gitlab.com>
Co-authored-by: Kassio Borges <kassioborgesm@gmail.com>