Disable gitaly for tags
What does this MR do?
Disable gitaly for tags
Why was this MR needed?
To unblock CE to EE https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2554#note_36403262
We could wait for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13094 but it might take some time. We could flip it back in that MR