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/subsystem-util/src/lib.rs

@@ -808,7 +808,7 @@ where
 					jobs.send_msg(to_job.relay_parent(), to_job).await;
 				}
 			}
-			Ok(Signal(BlockFinalized(_))) => {}
+			Ok(Signal(BlockFinalized(..))) => {}
 			Err(err) => {
 				tracing::error!(
 					job = Job::NAME,