Deeper pod environment status

Description

While working on deploy boards, it became obvious that we have an opportunity to use the same basic tool to show current environment status as well, not just the deploy status. I'm not sure exactly what that means for us, but we should explore it.

Some options:

• Look at state of pods in a replica set
• Hovering over a pod shows pod name/id and which deploy is running there
• More state information for each pod (like what?)
• Color boxes differently based on which deploy is running (Necessary for #1659 (closed) anyway)
• Show pod ready/not ready status (not sure that's meaningful, or different from what we're already doing)
• Show health information for each pod (from k8s?)
• Show metrics summary for each pod (from Prometheus)

Proposal

Links / references

• From https://gitlab.com/gitlab-org/gitlab-ee/issues/1589#note_24085830

changed milestone to %16

mentioned in issue #1589 (closed)

cc @dimitrieh Can you review the ux here?

I think it would be also extremely helpful to provide a view of the pod logs, as well as a quick way to access the console for that pod. Primarily to aid in debugging/troubleshooting without leaving GitLab.

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mentioned in issue #11762 (closed)

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