Add distributed rewards for the block in partitioned reward metrics (#32580)

report distributed rewards for the block in metrics

Co-authored-by: HaoranYi <haoran.yi@solana.com>

runtime/src/bank.rs

@@ -3714,6 +3714,7 @@ impl Bank {
             partition_index,
             store_stake_accounts_us,
             store_stake_accounts_count: this_partition_stake_rewards.len(),
+            distributed_rewards: total_rewards_in_lamports,
         };
 
         report_partitioned_reward_metrics(self, metrics);

runtime/src/bank/metrics.rs

@@ -172,13 +172,13 @@ pub(crate) fn report_new_bank_metrics(
 }
 
 /// Metrics for partitioned epoch reward store
-#[allow(dead_code)]
 #[derive(Debug, Default)]
 pub(crate) struct RewardsStoreMetrics {
     pub(crate) partition_index: u64,
     pub(crate) store_stake_accounts_us: u64,
     pub(crate) store_stake_accounts_count: usize,
     pub(crate) total_stake_accounts_count: usize,
+    pub(crate) distributed_rewards: u64,
     pub(crate) pre_capitalization: u64,
     pub(crate) post_capitalization: u64,
 }
@@ -207,6 +207,7 @@ pub(crate) fn report_partitioned_reward_metrics(bank: &Bank, timings: RewardsSto
             timings.total_stake_accounts_count,
             i64
         ),
+        ("distributed_rewards", timings.distributed_rewards, i64),
         ("pre_capitalization", timings.pre_capitalization, i64),
         ("post_capitalization", timings.post_capitalization, i64),
     );