Introducing a ReclaimPolicy for ephemerally created Volume resource
#1153
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Proposed Changes
ReclaimPolicyfor ephemerally createdVolumeresource with 2 supported modes:Retain: the resource is not deleted after the managing resource has been deletedDelete: the current behavior, the resource is garbage-collected when the managing resource has been deletedReclaimPolicywould be assumed to beDeleteto not to not break current behavior.OwnerReferenceis added to ephemerally created volume only in case ofReclaimPolicyis set toDeleteVolumeTemplateSpecto supportReclaimPolicytype along with existing VolumeSpec[Note: volume_release_controller is already taking care of releasing volumes whose claimer doesn't existing, by setting .spec.claimRef to nil when claimer
Machineobject is deleted. So not adding any extra logic for this]Fixes #1114