Expose gettor updater metrics

Gettor updater is producing metrics, but those are not being exposed outside rdsys-frontend-01 neither being consumed by prometheus. In the same machine we are exposing the gettor distributor metrics in https://rdsys-gettor.torproject.org/metrics.

The gettor updater is publishing the metrics in http://localhost:7800/metrics. Those should be publicly reachable. Should we configure them to be in https://rdsys-gettor-updater.torproject.org/metrics? or https://rdsys-gettor.torproject.org/updater-metrics?

And after is public can tpa configure prometheus to fetch those?