Enable wss

Hi
Im looking for a way to enable wss for my cluster behind envoy gateway and gateway api
For ingress nginx it was enabled by default

Here my logs when connecting:
```
{":authority":"blblblb","bytes_received":0,"bytes_sent":0,"connection_termination_details":null,"downstream_local_address":"10.4.4.201:443","downstream_remote_address":"150.230.144.80:21328","duration":52457,"method":"GET","protocol":"HTTP/1.1","requested_server_name":"3decision-api.discngine.cloud","response_code":0,"response_code_details":"downstream_remote_disconnect","response_flags":"DC","route_name":"httproute/tdecision/tdecision-3decision-api/rule/0/match/0/gkjtgjtgtd","start_time":"2026-03-09T13:38:01.091Z","upstream_cluster":"httproute/tdecision/tdecision-3decision-api/rule/0","upstream_host":null,"upstream_local_address":null,"upstream_transport_failure_reason":null,"user-agent":null,"x-envoy-origin-path":"/subscriptions","x-envoy-upstream-service-time":null,"x-forwarded-for":"150.230.144.80","x-request-id":"2ea8a202-2289-467e-9b51-6835ba15dc31"}
```