Simple uptime and status dashboard [goto-monitoring]

[Zash]

Proposed feature

Create a dashboard that gives a basic overview of the status of the cluster(s), answering questions like:

• Is the cluster running as it should?
• If not, what components might be having trouble?

Proposed alternatives

• Tweak the 'Uptime and status' dashboard
• Tweak the 'Prometheus Blackbox Exporter' to provide status of Kubernetes itself

Additional context

As a user, I would like to know if the cluster is up and running without having to hunt around many different dashboards.

Definition of done

• I can look at a single dashboard and know if the cluster is okay.
• This new feature is covered by public documentation