image: add upgrade-agent (#827)

operators/constellation-node-operator/config/manager/manager.yaml

@@ -60,6 +60,9 @@ spec:
             - mountPath: /etc/gce
               name: gceconf
               readOnly: true
+            - mountPath: /etc/constellation-upgrade-agent.sock
+              name: upgrade-agent-socket
+              readOnly: true
           resources:
             limits:
               cpu: 500m
@@ -88,6 +91,10 @@ spec:
           configMap:
             name: gceconf
             optional: true
+        - name: upgrade-agent-socket
+          hostPath:
+            path: /run/constellation-upgrade-agent.sock
+            type: Socket
       nodeSelector:
         node-role.kubernetes.io/control-plane: ""
       tolerations: