[kube-prometheus-stack] Add resources and SLIs metrics support

[kariya-mitsuru]

What this PR does / why we need it

Add resources and SLIs metrics support.

• KEP-1748: Expose Pod Resource Request Metrics
  • kube-scheduler
• KEP-3466: Kubernetes Component SLIs
  • kube-apiserver
  • kubelet
  • kube-controller-manager
  • kube-scheduler
  • kube-proxy

Which issue this PR fixes

Special notes for your reviewer

Checklist

• [x] DCO signed
• [x] Chart Version bumped
• [x] Title of the PR starts with chart name (e.g. [prometheus-couchdb-exporter])

[kariya-mitsuru]

Is /metrics/cadvisor safe to remove? Are the metrics availible somewhere else, e.g. /metrics/resources? I also have to look later, if the current dashboards/alerts are compatible here.

I don't think /metrics/cadvisor can be removed because the metrics available in /metrics/cadvisor are different from those available in these endpoints.

[jkroepke]

Hi @kariya-mitsuru

I appreciate your review, but currently I have time limitations to checkout and try-out this PR. I never used the endpoints before I someone might have to test it.

Maybe @QuentinBisson or @GMartinez-Sisti can assists here

[GMartinez-Sisti]

Hi @kariya-mitsuru

I appreciate your review, but currently I have time limitations to checkout and try-out this PR. I never used the endpoints before I someone might have to test it.

Maybe @QuentinBisson or @GMartinez-Sisti can assists here

Thanks for the PR @kariya-mitsuru 🙏 I actually have an upcoming project at work that will benefit from this, so I'll need to read on this. Might take some weeks for me to pick it up though.