Shared content for all Kubernetes secrets docs - encrypted storage class spec

Create a storage class with the secure parameter set to true.

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: px-secure-sc
provisioner: pxd.portworx.com
parameters:
  secure: "true"
  repl: "3"

To create a sharedv4 encrypted volume set the sharedv4 parameter to true as well.