Use correct secret name for csi-upcloud pull secret (#11597)

roles/kubernetes-apps/csi_driver/upcloud/templates/upcloud-csi-controller.yml.j2

@@ -100,7 +100,7 @@ spec:
             - name: socket-dir
               mountPath: /var/lib/csi/sockets/pluginproxy/
       imagePullSecrets:
-        - name: regcred
+        - name: upcloud
       volumes:
         - name: socket-dir
           emptyDir: {}

roles/kubernetes-apps/csi_driver/upcloud/templates/upcloud-csi-node.yml.j2

@@ -77,7 +77,7 @@ spec:
             - name: device-dir
               mountPath: /dev
       imagePullSecrets:
-        - name: regcred
+        - name: upcloud
       volumes:
         - name: registration-dir
           hostPath: