Support of allowed_client_headers_on_success in extAuth http SecurityPolicy

We need to set a cookie in our ext auth service, for this we need [allowed_client_headers_on_success](https://www.envoyproxy.io/docs/envoy/latest/api-v3/extensions/filters/http/ext_authz/v3/ext_authz.proto#envoy-v3-api-field-extensions-filters-http-ext-authz-v3-authorizationresponse-allowed-client-headers-on-success)

Currently we use EnvoyPatchPolicy to add the configuration, but native support would be great

Thank you