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/availability-distribution/src/requester/mod.rs

@@ -23,7 +23,6 @@ use std::collections::{
 };
 use std::iter::IntoIterator;
 use std::pin::Pin;
-use std::sync::Arc;
 
 use futures::{
 	channel::mpsc,
@@ -36,7 +35,7 @@ use sp_keystore::SyncCryptoStorePtr;
 use polkadot_node_subsystem_util::request_availability_cores_ctx;
 use polkadot_primitives::v1::{CandidateHash, CoreState, Hash, OccupiedCore};
 use polkadot_subsystem::{
-	messages::AllMessages, ActiveLeavesUpdate, jaeger, SubsystemContext,
+	messages::AllMessages, ActiveLeavesUpdate, SubsystemContext, ActivatedLeaf,
 };
 
 use super::{error::recv_runtime, session_cache::SessionCache, LOG_TARGET, Metrics};
@@ -121,12 +120,12 @@ impl Requester {
 	async fn start_requesting_chunks<Context>(
 		&mut self,
 		ctx: &mut Context,
-		new_heads: impl Iterator<Item = (Hash, Arc<jaeger::Span>)>,
+		new_heads: impl Iterator<Item = ActivatedLeaf>,
 	) -> super::Result<Option<NonFatalError>>
 	where
 		Context: SubsystemContext,
 	{
-		for (leaf, _) in new_heads {
+		for ActivatedLeaf { hash: leaf, .. } in new_heads {
 			let cores = match query_occupied_cores(ctx, leaf).await {
 				Err(err) => return Ok(Some(err)),
 				Ok(cores) => cores,