The problem we had back then was that `mkRenamedOptionModule` doesn't
work if an option will be moved a level depper, i.e.
services.grafana.provision.dashboards
became
services.grafana.provision.dashboards.settings.provider
I actually planned to remove this before 23.05 (since the change was
already released in 22.11), but as you can see that didn't happen ;-)
I think the grace-period was quite long already. And if someone is
migrating from <22.11 to a current NixOS now, there are very precise
instructions on how to upgrade in the 22.11 release notes.
698c640e77