split NetworkBridge into two subsystems (#5616)

* foo

* rolling session window

* fixup

* remove use statemetn

* fmt

* split NetworkBridge into two subsystems

Pending cleanup

* split

* chore: reexport OrchestraError as OverseerError

* chore: silence warnings

* fixup tests

* chore: add default timenout of 30s to subsystem test helper ctx handle

* single item channel

* fixins

* fmt

* cleanup

* remove dead code

* remove sync bounds again

* wire up shared state

* deal with some FIXMEs

* use distinct tags

Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>

* use tag

Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>

* address naming

tx and rx are common in networking and also have an implicit meaning regarding networking
compared to incoming and outgoing which are already used with subsystems themselvesq

* remove unused sync oracle

* remove unneeded state

* fix tests

* chore: fmt

* do not try to register twice

* leak Metrics type

Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com>
Co-authored-by: Andronik <write@reusable.software>

polkadot/node/network/bridge/src/metrics.rs

@@ -26,6 +26,7 @@ fn peer_set_label(peer_set: PeerSet, version: ProtocolVersion) -> &'static str {
 	peer_set.get_protocol_name_static(version).unwrap_or("<internal error>")
 }
 
+#[allow(missing_docs)]
 impl Metrics {
 	pub fn on_peer_connected(&self, peer_set: PeerSet, version: ProtocolVersion) {
 		self.0.as_ref().map(|metrics| {