This patch adds the upstream dashboards to this setup, adding them
automatically to Grafana.

References:
https://unpoller.com/docs/install/grafana#recommendations

This patch adds an unpoller deployment to the infrastrcuture which
should allow to monitor the unifi infrastructure from the Kubernetes
cluster. The next step, once metrics are collected is to add dashboards
and define alerts. But one step after the other.

References:
https://unpoller.com/

This version needs certain database extensions that are implemented as
part of the database setup.