getEpochInfo RPC endpoint now includes the current block height (#11155)

Co-authored-by: Michael Vines <mvines@gmail.com>

runtime/src/bank.rs

@@ -2720,6 +2720,7 @@ impl Bank {
 
     pub fn get_epoch_info(&self) -> EpochInfo {
         let absolute_slot = self.slot();
+        let block_height = self.block_height();
         let (epoch, slot_index) = self.get_epoch_and_slot_index(absolute_slot);
         let slots_in_epoch = self.get_slots_in_epoch(epoch);
         EpochInfo {
@@ -2727,6 +2728,7 @@ impl Bank {
             slot_index,
             slots_in_epoch,
             absolute_slot,
+            block_height,
         }
     }