Make agent's outgoing connect async

[aviramha]

When agent handles connect request and times out, it will not process any message coming from layer for 3s

            LayerTcpOutgoing::Connect(LayerConnect { remote_address }) => {
                let daemon_connect = time::timeout(
                    Self::CONNECT_TIMEOUT,
                    SocketStream::connect(remote_address.clone(), self.pid),
                )
                .await

We should make the result async instead of sync probably after closing #1898 (since it won't have any effect beforethen)