deploy: add CSI-Addons endpoint

Deployments place all sockets for communicating with CSI components in
the shared `/csi` directory. The CSI-Addons socket was introduced
recently, but not configured to be in the same location (by default
placed in `/tmp`).

Signed-off-by: Niels de Vos <ndevos@redhat.com>

deploy/rbd/kubernetes/csi-rbdplugin-provisioner.yaml

@@ -118,6 +118,7 @@ spec:
             - "--type=rbd"
             - "--controllerserver=true"
             - "--endpoint=$(CSI_ENDPOINT)"
+            - "--csi-addons-endpoint=$(CSI_ADDONS_ENDPOINT)"
             - "--v=5"
             - "--drivername=rbd.csi.ceph.com"
             - "--pidlimit=-1"
@@ -141,6 +142,8 @@ spec:
             #   value: encryptionConfig
             - name: CSI_ENDPOINT
               value: unix:///csi/csi-provisioner.sock
+            - name: CSI_ADDONS_ENDPOINT
+              value: unix:///csi/csi-addons.sock
           imagePullPolicy: "IfNotPresent"
           volumeMounts:
             - name: socket-dir