envoy: Sync supported resources in CiliumEnvoyConfig

[ upstream commit cc56e70 ]

These resources are enabled in cilum-proxy build, and can be used in
CiliumEnvoyConfig directly, however, without related imported
statements, Cilium agent will fail to marshal/unmarshal objects.

Sample error

```
level=warning msg="Ignoring invalid CiliumEnvoyConfig JSON (proto:\u00a0(line 1:405): unable to resolve \"type.googleapis.com/envoy.extensions.filters.http.router.v3.Router\": \"not found\")
```

Signed-off-by: Tam Mach <tam.mach@cilium.io>