Helper for logging GetServiceInfo

[jwreagor]

This isn't zerolog specific but it would probably be helpful to wrap this in a function that consumers can use to list the services gRPC has registered.

for k, v := range server.grpcServer.GetServiceInfo() {
	mountLog := server.logger.With().
		Str("service", k).
		Str("component", "server-grpc").
		Logger()
	for _, r := range v.Methods {
		mountLog.Info().Msgf("mounted endpoint for %s", r.Name)
	}
}