Record vote account commission with voting/staking rewards and surface in RPC

ledger/benches/protobuf.rs

@@ -21,6 +21,7 @@ fn create_rewards() -> Rewards {
             lamports: 42 + i,
             post_balance: std::u64::MAX,
             reward_type: Some(RewardType::Fee),
+            commission: None,
         })
         .collect()
 }

ledger/src/blockstore.rs

@@ -8346,6 +8346,7 @@ pub mod tests {
                     lamports: 42 + i,
                     post_balance: std::u64::MAX,
                     reward_type: Some(RewardType::Fee),
+                    commission: None,
                 })
                 .collect();
             let protobuf_rewards: generated::Rewards = rewards.into();
@@ -8412,6 +8413,7 @@ pub mod tests {
                     lamports: -42,
                     post_balance: 42,
                     reward_type: Some(RewardType::Rent),
+                    commission: None,
                 }]),
             };
             let deprecated_status: StoredTransactionStatusMeta = status.clone().into();