Resource dashboards show invalid comparison of cpu and memory quota

[bboreham]

This is comparing actual usage by pods against a maximum possible total of requests:

kube_resourcequota{resource="requests.cpu"} is defined as "the sum of CPU requests cannot exceed this value".

To highlight "how much your namespace is using outside of what it’s requesting", the original intention in #364, would be sum(kube_pod_container_resource_requests{resource="cpu"})

It would also be defensible to sum all the requests and show that compared against the quota.

[github-actions]

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