Disable health check button if managed

Also, update ui screen tests to expect
injecting "listener_port: null" if
listener_port is empty

Signed-off-by: Seth Foster <fosterbseth@gmail.com>

awx/ui/src/screens/Instances/InstanceAdd/InstanceAdd.test.js

@@ -36,6 +36,7 @@ describe('<InstanceAdd />', () => {
       });
     });
     expect(InstancesAPI.create).toHaveBeenCalledWith({
+      listener_port: null, // injected if listener_port is not set
       node_type: 'hop',
     });
     expect(history.location.pathname).toBe('/instances/13/details');

awx/ui/src/screens/Instances/InstanceDetail/InstanceDetail.js

@@ -369,7 +369,7 @@ function InstanceDetail({ setBreadcrumb, isK8s }) {
                 isDisabled={
                   !config?.me?.is_superuser ||
                   instance.health_check_pending ||
-                  !instance.managed
+                  instance.managed
                 }
                 variant="primary"
                 ouiaId="health-check-button"

awx/ui/src/screens/Instances/InstanceDetail/InstanceDetail.test.js

@@ -48,6 +48,7 @@ describe('<InstanceDetail/>', () => {
         cpu_capacity: 32,
         mem_capacity: 38,
         enabled: true,
+        managed: false,
         managed_by_policy: true,
         node_type: 'execution',
         node_state: 'ready',