Using interface name in kubectl plugin

In Rocky we've changed format of Pod annotations.
Adding the new format in kubectl plugin

Change-Id: I8933d331b15ccb7b0fa33b796537b26112bf8cf0

contrib/kubectl_plugins/kuryr/kuryr

@@ -132,6 +132,7 @@ def vifs(session, server, namespace, args):
         else:
             vif = json.loads(vif)
 
+        vif = vif.get('eth0', vif)
         network = (vif['versioned_object.data']['network']
                    ['versioned_object.data'])
         first_subnet = (network['subnets']['versioned_object.data']