Add queue / instance group registration to heartbeat for k8s installs

There is some history here.

https://github.com/ansible/awx/pull/7190 <- This PR was an attempt at fixing a
bug notting ran into where some jobs on k8s installs would get stuck in Waiting
forever.

The PR mentioned above introduced a bug where there are no instance groups on a
fresh k8s-based install. This is because this process currently happens in the
launch scripts, before the database is up.

With this patch, queue / instance group registration happens in the heartbeat,
right after auto-registering the instance.

awx/main/managers.py

@@ -149,8 +149,11 @@ class InstanceManager(models.Manager):
 
     def get_or_register(self):
         if settings.AWX_AUTO_DEPROVISION_INSTANCES:
+            from awx.main.management.commands.register_queue import RegisterQueue
             pod_ip = os.environ.get('MY_POD_IP')
-            return self.register(ip_address=pod_ip)
+            registered = self.register(ip_address=pod_ip)
+            RegisterQueue('tower', None, 100, 0, []).register()
+            return registered
         else:
             return (False, self.me())