Add block number to activated leaves and associated fixes (#2718)

* add number to `ActivatedLeavesUpdate`

* update subsystem util and overseer

* use new ActivatedLeaf everywhere

* sort view

* sorted and limited view in network bridge

* use live block hash only if it's newer

* grumples

polkadot/node/network/collator-protocol/src/collator_side.rs

@@ -955,7 +955,7 @@ mod tests {
 	use polkadot_subsystem::{
 		jaeger,
 		messages::{RuntimeApiMessage, RuntimeApiRequest},
-		ActiveLeavesUpdate,
+		ActiveLeavesUpdate, ActivatedLeaf,
 	};
 	use polkadot_subsystem_testhelpers as test_helpers;
 
@@ -1215,7 +1215,11 @@ mod tests {
 		overseer_signal(
 			virtual_overseer,
 			OverseerSignal::ActiveLeaves(ActiveLeavesUpdate {
-				activated: [(test_state.relay_parent, Arc::new(jaeger::Span::Disabled))][..].into(),
+				activated: vec![ActivatedLeaf {
+					hash: test_state.relay_parent,
+					number: 1,
+					span: Arc::new(jaeger::Span::Disabled),
+				}].into(),
 				deactivated: [][..].into(),
 			}),
 		).await;