Add peers readonly api and instancelink constraint (#13916)

Add Disconnected link state

introspect_receptor_connections is a periodic
task that examines active receptor connections
and cross-checks it with the InstanceLink info.

Any links that should be active but are not
will be put into a Disconnected state. If
active, it will be in an Established state.

UI - Add hop creation and peers mgmt (#13922)

* add UI for mgmt peers, instance edit and add

* add peer info on detail and bug fix on detail

* remove unused chip and change peer label

* rename lookup, put Instance type disable on edit

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Co-authored-by: tanganellilore <lorenzo.tanagnelli@hotmail.it>

awx/api/views/root.py

@@ -129,6 +129,7 @@ class ApiVersionRootView(APIView):
         data['mesh_visualizer'] = reverse('api:mesh_visualizer_view', request=request)
         data['bulk'] = reverse('api:bulk', request=request)
         data['analytics'] = reverse('api:analytics_root_view', request=request)
+        data['peers'] = reverse('api:peers_list', request=request)
         return Response(data)