Description:
It would be highly useful to support query_parameter as a source for consistent hashing in Envoy Gateway, similar to how it is already supported in Envoy.

Use case:
In some scenarios, critical routing or load balancing information is passed via query parameters (e.g., ?user_id=12345). Supporting query_parameter in the consistentHash configuration would allow users to achieve more effective and accurate request distribution when using Envoy Gateway.

[optional Relevant Links:]

https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/route/v3/route_components.proto#envoy-v3-api-msg-config-route-v3-routeaction-hashpolicy