Add check Gitaly config in gitlab:check
### Problem to solve
It can be hard to know if Gitaly is configured and connectable.
### Further details
I couldn't find solution for gitlab-ce#62087 .
### Proposal
Please add checks for gitaly paths in gitaly config in `sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production` and checks for passing stuff around gitaly.
issue