feat: grafana dashboard

[oliverbaehler]

Describe the feature

Currently we provide a lot of metrics but little Grafana dashboards. We should provide some built-in operational dashboards:

• Control-Dashboard: For all resources shows their Ready/Health condition. Essentially having an overview what's not working.
• Custom Quota Dashboard: Dashboard to validate to usage and availability of GlobalCustomQuotas and CustomQuotas

[github-actions]

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