[Enhancement]: Kube(CPU|Memory)QuotaOvercommit alerts use max number of nodes instead of current ones

[afarbos]

What's the general idea for the enhancement?

Currently both alerts (KubeCPUQuotaOvercommit and KubeMemortQuotaOvercommit) compute the total available capacity using the current amount of nodes in the cluster.
However, this alert can become really noisy if the current amount of nodes is not the maximum amount of nodes available.
Today, a lot of the time k8s clusters are deployed with cluster autoscaler or come with it builtin (AKS, GKE...).
We should have a way to influence those alerts to retrieve the maximum amount of nodes instead of looking at the current one.

See this metric that could be helpful for example: see https://github.com/kubernetes/autoscaler/blob/213a8595ea2bddf433dd56e50c31ca868ef1da80/cluster-autoscaler/metrics/metrics.go#L157-L163

Please provide any helpful snippets.

No response

What parts of the codebase does the enhancement target?

Alerts

Anything else relevant to the enhancement that would help with the triage process?

No response

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