refactor View to include finalized_number (#2128)

* refactor View to include finalized_number

* guide: update the NetworkBridge on BlockFinalized

* av-store: fix the tests

* actually fix tests

* grumbles

* ignore macro doctest

* use Hash::repeat_bytes more consistently

* broadcast empty leaves updates as well

* fix issuing view updates on empty leaves updates

polkadot/node/core/runtime-api/src/lib.rs

@@ -152,7 +152,7 @@ async fn run<Client>(
 			req = ctx.recv().fuse() => match req? {
 				FromOverseer::Signal(OverseerSignal::Conclude) => return Ok(()),
 				FromOverseer::Signal(OverseerSignal::ActiveLeaves(_)) => {},
-				FromOverseer::Signal(OverseerSignal::BlockFinalized(_)) => {},
+				FromOverseer::Signal(OverseerSignal::BlockFinalized(..)) => {},
 				FromOverseer::Communication { msg } => match msg {
 					RuntimeApiMessage::Request(relay_parent, request) => {
 						subsystem.spawn_request(relay_parent, request);