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/consensus.rs

@@ -762,6 +762,7 @@ pub mod test {
                             &keypairs.node_keypair,
                             &keypairs.vote_keypair,
                             &keypairs.vote_keypair,
+                            None,
                         );
                         info!("voting {} {}", parent_bank.slot(), parent_bank.hash());
                         new_bank.process_transaction(&vote_tx).unwrap();