Track votes from gossip for optimistic confirmation (#11209)

* Add check in cluster_info_vote_listenere to see if optimstic conf was achieved
Add OptimisticConfirmationVerifier

* More fixes

* Fix merge conflicts

* Remove gossip notificatin

* Add dashboards

* Fix rebase

* Count switch votes as well toward optimistic conf

* rename

Co-authored-by: Carl <carl@solana.com>

core/src/tpu.rs

@@ -81,6 +81,7 @@ impl Tpu {
             subscriptions.clone(),
             verified_vote_sender,
             replay_votes_receiver,
+            blockstore.clone(),
         );
 
         let banking_stage = BankingStage::new(