feat(rpc): expose epoch height for local reconstruct vmcontext (#4221)

reproduce contract call with vm standalone requires a vmcontext, which takes epoch height instead of epoch id. This only introduce new field in view, should not cause any protocol change or breaking existing code use `validator` rpc

Test Plan
------------
CI

chain/chain/src/test_utils.rs

@@ -1026,6 +1026,7 @@ impl RuntimeAdapter for KeyValueRuntime {
             current_proposals: vec![],
             prev_epoch_kickout: vec![],
             epoch_start_height: 0,
+            epoch_height: 1,
         })
     }
 

chain/epoch_manager/src/lib.rs

@@ -923,6 +923,7 @@ impl EpochManager {
             ValidatorInfoIdentifier::BlockHash(ref b) => self.get_block_info(b)?.epoch_id().clone(),
         };
         let cur_epoch_info = self.get_epoch_info(&epoch_id)?.clone();
+        let epoch_height = cur_epoch_info.epoch_height();
         let epoch_start_height = self.get_epoch_start_from_epoch_id(&epoch_id)?;
         let mut validator_to_shard = (0..cur_epoch_info.validators_len())
             .map(|_| HashSet::default())
@@ -1051,6 +1052,7 @@ impl EpochManager {
             current_proposals: all_proposals,
             prev_epoch_kickout,
             epoch_start_height,
+            epoch_height,
         })
     }
 

core/primitives/src/views.rs

@@ -1324,8 +1324,10 @@ pub struct EpochValidatorInfo {
     pub current_proposals: Vec<ValidatorStakeView>,
     /// Kickout in the previous epoch
     pub prev_epoch_kickout: Vec<ValidatorKickoutView>,
-    /// Epoch start height
+    /// Epoch start block height
     pub epoch_start_height: BlockHeight,
+    /// Epoch height
+    pub epoch_height: EpochHeight,
 }
 
 #[derive(BorshSerialize, BorshDeserialize, Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]

neard/src/runtime/mod.rs

@@ -2422,7 +2422,8 @@ mod test {
                 )
                 .into()],
                 prev_epoch_kickout: Default::default(),
-                epoch_start_height: 1
+                epoch_start_height: 1,
+                epoch_height: 1,
             }
         );
         env.step_default(vec![]);