Add Support For Gateway API

[aldmbmtl]

With the upstream k8s ingress API being deprecated in favor of the Gateway API, we should begin investigating nginx gateway fabric as an alternative.

[danielpodwysocki]

I opted for Envoy's implementation https://gateway.envoyproxy.io/

I'll add it and get a migration path away from ingress-nginx in place.

Internal details on the why are tracked in:
https://github.com/juno-fx/kuiper/issues/226

[danielpodwysocki]

This pivoted to Traefik after practical testing.

[skeleturtle]

@danielpodwysocki

I believe this should just be closed now?