Required metrics in README is missing a few values

[voidlily]

Describe the bug
In my cluster I'm having issues with the high cardinality of cAdvisor metrics and trying to make an allowlist of only the metrics krr needs. The readme mentioned these metrics

container_cpu_usage_seconds_total
container_memory_working_set_bytes

I noticed however that there were others missing like machine_memory_bytes and machine_cpu_cores that the cluster summary asks for and are otherwise missing.

For kube-state-metrics there's a few others I noticed but might have missed, because I haven't yet tried limiting kube-state-metrics because its cardinality was not as high as cAdvisor was.

kube_pod_container_resource_limits
kube_job_owner
kube_pod_container_status_last_terminated_reason

This might not even be all of them, I didn't search very deeply in the code yet.

Expected behavior
A list of all metrics that krr expects so I can make a thorough allowlist. Possibly tailored to which component of kube-prometheus-stack each comes from (cAdvisor, kubelet, kube-state-metrics, etc), though not strictly necessary.

[aantn]

Thanks, you're right! If you're open to contributing, we'd love to accept a PR improving the docs on this.