Notify lookup sync of gossip processing results (#5722)

* Notify lookup sync of gossip processing results

* Add tests

* Add GossipBlockProcessResult event

* Re-add dropped comments

* Update beacon_node/network/src/network_beacon_processor/sync_methods.rs

* update test_lookup_disconnection_peer_left

beacon_node/network/src/sync/manager.rs

@@ -144,6 +144,9 @@ pub enum SyncMessage<E: EthSpec> {
         process_type: BlockProcessType,
         result: BlockProcessingResult<E>,
     },
+
+    /// A block from gossip has completed processing,
+    GossipBlockProcessResult { block_root: Hash256, imported: bool },
 }
 
 /// The type of processing specified for a received block.
@@ -153,14 +156,6 @@ pub enum BlockProcessType {
     SingleBlob { id: Id },
 }
 
-impl BlockProcessType {
-    pub fn id(&self) -> Id {
-        match self {
-            BlockProcessType::SingleBlock { id } | BlockProcessType::SingleBlob { id } => *id,
-        }
-    }
-}
-
 #[derive(Debug)]
 pub enum BlockProcessingResult<E: EthSpec> {
     Ok(AvailabilityProcessingStatus),
@@ -637,6 +632,14 @@ impl<T: BeaconChainTypes> SyncManager<T> {
             } => self
                 .block_lookups
                 .on_processing_result(process_type, result, &mut self.network),
+            SyncMessage::GossipBlockProcessResult {
+                block_root,
+                imported,
+            } => self.block_lookups.on_external_processing_result(
+                block_root,
+                imported,
+                &mut self.network,
+            ),
             SyncMessage::BatchProcessed { sync_type, result } => match sync_type {
                 ChainSegmentProcessId::RangeBatchId(chain_id, epoch) => {
                     self.range_sync.handle_block_process_result(