Connect TPU's broadcast service with TVU's blob fetch stage (#2587)

* Connect TPU's broadcast service with TVU's blob fetch stage

- This is needed since ledger is being written only in TVU now

* fix clippy warnings

* fix failing test

* fix broken tests

* fixed failing tests

src/replicator.rs

@@ -167,8 +167,9 @@ impl Replicator {
         let mut blob_sockets: Vec<Arc<UdpSocket>> =
             node.sockets.tvu.into_iter().map(Arc::new).collect();
         blob_sockets.push(repair_socket.clone());
-        let (fetch_stage, blob_fetch_receiver) =
-            BlobFetchStage::new_multi_socket(blob_sockets, exit.clone());
+        let (blob_fetch_sender, blob_fetch_receiver) = channel();
+        let fetch_stage =
+            BlobFetchStage::new_multi_socket(blob_sockets, &blob_fetch_sender, exit.clone());
 
         // todo: pull blobs off the retransmit_receiver and recycle them?
         let (retransmit_sender, retransmit_receiver) = channel();
@@ -189,6 +190,7 @@ impl Replicator {
                 leader_pubkey,
             ))),
             done.clone(),
+            exit.clone(),
         );
 
         info!("window created, waiting for ledger download done");