access: add access checks

Rework the access checks.
Add owner field to more objects to do access control checks
Make sure the object global is set in the object before signaling the
new global.

pinos/server/client-node.c

@@ -1177,6 +1177,7 @@ pinos_client_node_new (PinosClient     *client,
   proxy_init (&impl->proxy, NULL, client->core->support, client->core->n_support);
 
   this->node = pinos_node_new (client->core,
+                               client,
                                name,
                                true,
                                &impl->proxy.node,