K8S-531 allow nfs-client-provisioner missing

Author: dfateyev

addons/upgrade.jps

@@ -179,7 +179,7 @@ actions:
          helm delete nfs-client-provisioner;
          helm repo add nfs-subdir-external-provisioner https://kubernetes-sigs.github.io/nfs-subdir-external-provisioner/;
          helm repo update;
-         helm install nfs-subdir-external-provisioner nfs-subdir-external-provisioner/nfs-subdir-external-provisioner -f /tmp/nfs-provisioner-options.yaml; }
+         helm install nfs-subdir-external-provisioner nfs-subdir-external-provisioner/nfs-subdir-external-provisioner -f /tmp/nfs-provisioner-options.yaml; } ||:
     - cmd[${nodes.k8sm.master.id}]: |-
         helm repo add deliveryhero https://charts.deliveryhero.io/
         helm repo update