Don't attempt to look up an avatar in repo if repo directory does not exist
Relates to https://sentry.gitlap.com/gitlab/gitlabcom/issues/3507/
Closes #14580 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Relates to https://sentry.gitlap.com/gitlab/gitlabcom/issues/3507/
Closes #14580 (closed)