Move code from sc-network-common back to sc-network (#13592)

* Move service tests to `client/network/tests`

These tests depend on `sc-network` and `sc-network-sync` so they should
live outside the crate.

* Move some configs from `sc-network-common` to `sc-network`

* Move `NetworkService` traits to `sc-network`

* Move request-responses to `sc-network`

* Remove more stuff

* Remove rest of configs from `sc-network-common` to `sc-network`

* Remove more stuff

* Fix warnings

* Update client/network/src/request_responses.rs

Co-authored-by: Dmitry Markin <dmitry@markin.tech>

* Fix cargo doc

---------

Co-authored-by: Dmitry Markin <dmitry@markin.tech>

substrate/client/network/sync/src/service/network.rs

@@ -18,13 +18,15 @@
 
 use futures::{channel::oneshot, StreamExt};
 use libp2p::PeerId;
-use sc_network_common::{
-	protocol::ProtocolName,
+
+use sc_network::{
 	request_responses::{IfDisconnected, RequestFailure},
-	service::{NetworkNotification, NetworkPeers, NetworkRequest},
+	types::ProtocolName,
+	NetworkNotification, NetworkPeers, NetworkRequest,
 };
 use sc_peerset::ReputationChange;
 use sc_utils::mpsc::{tracing_unbounded, TracingUnboundedReceiver, TracingUnboundedSender};
+
 use std::sync::Arc;
 
 /// Network-related services required by `sc-network-sync`