Kubernetes 1.31 now honors the ReclaimPolicy of the PV

[daniddelrio]

According to Kubernetes:

The Always Honor PersistentVolume Reclaim Policy feature has advanced to beta in Kubernetes v1.31. This enhancement ensures that the PersistentVolume (PV) reclaim policy is respected even after the associated PersistentVolumeClaim (PVC) is deleted, thereby preventing the leakage of volumes.

This means that this is enabled by default starting from 1.31. I know there are existing problems with PVs accumulating with ARC when ReclaimPolicy is set to Delete (see #2266).

Given that the ARC code itself is expecting the ReclaimPolicy to be Retain, it's important to explicitly state that ARC is expecting this ReclaimPolicy, OR to fix the issue with the Delete ReclaimPolicy to avoid unintended consequences after upgrading Kubernetes.