v1.16: bank_send_loop: Get feature flag from root bank (backport of #…

…31954) (#32113)

bank_send_loop: Get feature flag from root bank

(cherry picked from commit dd379bf)

# Conflicts:
#	core/src/cluster_info_vote_listener.rs

Co-authored-by: Ashwin Sekar <ashwin@solana.com>

core/src/cluster_info_vote_listener.rs

@@ -265,6 +265,7 @@ impl ClusterInfoVoteListener {
                 .unwrap()
         };
         let exit_ = exit.clone();
+        let bank_forks_clone = bank_forks.clone();
         let bank_send_thread = Builder::new()
             .name("solCiBankSend".to_string())
             .spawn(move || {
@@ -273,6 +274,7 @@ impl ClusterInfoVoteListener {
                     verified_vote_label_packets_receiver,
                     poh_recorder,
                     &verified_packets_sender,
+                    bank_forks_clone,
                 );
             })
             .unwrap();
@@ -377,6 +379,7 @@ impl ClusterInfoVoteListener {
         verified_vote_label_packets_receiver: VerifiedLabelVotePacketsReceiver,
         poh_recorder: Arc<RwLock<PohRecorder>>,
         verified_packets_sender: &BankingPacketSender,
+        bank_forks: Arc<RwLock<BankForks>>,
     ) -> Result<()> {
         let mut verified_vote_packets = VerifiedVotePackets::default();
         let mut time_since_lock = Instant::now();
@@ -391,11 +394,7 @@ impl ClusterInfoVoteListener {
                 .read()
                 .unwrap()
                 .would_be_leader(3 * slot_hashes::MAX_ENTRIES as u64 * DEFAULT_TICKS_PER_SLOT);
-            let feature_set = poh_recorder
-                .read()
-                .unwrap()
-                .bank()
-                .map(|bank| bank.feature_set.clone());
+            let feature_set = Some(bank_forks.read().unwrap().root_bank().feature_set.clone());
 
             if let Err(e) = verified_vote_packets.receive_and_process_vote_packets(
                 &verified_vote_label_packets_receiver,