Support regex rewrites for paths during HTTP redirects

*Description*:
Due to legacy reasons we require the ability to regex rewrite some paths during a redirect procedure similarly how its done [here](https://gateway.envoyproxy.io/docs/tasks/traffic/http-urlrewrite/#rewrite-url-path-with-regex).

**_Note:_**
>Combining a redirect rule together with a rewrite rule does not work since you cant specify both at once.

Underlying envoy proxy [supports this](https://github.com/envoyproxy/envoy/issues/14348) so I think its a matter of exposing the configuration?

Thanks,
Nic