As of now, the source for grafana-plugins lives on Gerrit which requires several manual steps in order to build the package each time we add a new plugin or update the existing ones.
Migrating the repository to GitLab would allow us to use the GitLab CI pipeline [1] to ease the process which will be beneficial as now we'll have to update the Prometheus data source independently of the Grafana package due to T436045.
- Add GitLab pipeline
- Add project to GitLab trusted runners
- Add it to the apt repo to promote from staging
- Update Wikitech instructions
- Add auto restart for grafana-server after grafana-plugins upgrade
[1] https://wikitech.wikimedia.org/wiki/Debian_packaging/Package_your_software_as_deb#GitLab_CI_pipeline
