Define monitoring for third party elements of 3scale like Mysql, Redis, Postgresql.

Look for standardized way of monitoring this common components in projects like rhmi. Look for stable prometheus exporters, define grafana dashboarsds and define prometheus rules for alerts.

Links that can be useful:
https://github.com/integr8ly/integreatly-operator/tree/master/templates/monitoring
https://github.com/3scale/prometheus-exporter-operator