Description:
I'm trying out the new XListenerSet feature, and noticed that if I have a route in the same namespace as my XListenerSet manifest, the route will not attach to the XListenerSet unless the allowedRoutes.namespaces.from is set to ALL. I think this is because the route's namespace is being compared to the gateway's namespace rather than the XListenerSet's namespace here

Repro steps:

1. Create a gateway in NamespaceA with allowedListeners.namespaces.from: ALL
2. Create a listenerSet in NamespaceB with a parentRef of the gateway, and with a listener that does not have the allowedRoutes section
3. Create a route in NamespaceB that has a parentRef of the listenerSet
4. Note that the route cannot attach with a status of No listeners included by this parent ref allowed this attachment.

Environment:
Version: 1.7.0
config.envoyGateway.gatewayAPI.enabled: ['XListenerSet']