*Description*: This issue tracks the design of the authentication policy APIs for Envoy Gateway leveraging the extension points within the [Gateway API](https://gateway-api.sigs.k8s.io) Design docs for extensions are [here](https://docs.google.com/document/d/12jEb81Hf40UeMqXtnGObowB3PzyB21VrF2m4dXGYnls/edit?usp=sharing) & specifically authentication policy are [here](https://docs.google.com/document/d/1TlQjBy1utEwgrxE_HVT4-EHpVJ51hgnfMuAh0Q_uNoE/edit)
Description:
This issue tracks the design of the authentication policy APIs for Envoy Gateway leveraging the extension points within the Gateway API
Design docs for extensions are here & specifically authentication policy are here