Support DirectResponse with K8S Gateway API

[DuncanDoyle]

Gloo Edge Product

Enterprise

Gloo Edge Version

1.17.0

Is your feature request related to a problem? Please describe.

The Gloo Edge API has a feature called Direct Response Action that allows you to send a direct response to a client on a route match, without hitting the upstream.

In our K8S Gateway API we currently don't support this feature. There is an ongoing discussion in community to add this functionality as a first class citizen in K8S Gateway API in the form of an HttpRouteFilter: https://github.com/kubernetes-sigs/gateway-api/issues/2826

Describe the solution you'd like

Suppport DirectResponseAction semantics with K8S Gateway API, ideally based on features in the Gateway API spec itself: https://github.com/kubernetes-sigs/gateway-api/issues/2826

Describe alternatives you've considered

Implement DirectResponseAction in a Solo API as an extension to K8S Gateway API.

Additional Context

No response

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