Change eviction machinery

[RomanenkoDenys]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Currently, when vertical-pod-autoscaler counts pods that can be evicted, VPA cannot keep track of the status of the pods. This can lead to some problems when pods are not ready yet, but replicas are still being evicted.

To prevent this, we can use PDB, but PDB is not available for DaemonSets.

This PR proposes a different scheme where we only consider ready-pods to eviction.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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