Deploy `gitlab-monitor` and enable for metrics
We should deploy
gitlab-monitor, connect it to its respective components, and set it up for scraping. I don't think there is a current docker image we can use, we may need to make one.
This is low priority, compared to the other exporters. We should also strongly consider if we can deprecate this and get these metrics elsewhere now that we have Ruby metrics. The main straggler is likely to be