Fix stale beacon_state_root in test helpers (#9289)

Test helpers `add_attested_block_at_slot` and `add_attested_blocks_at_slot` accepted `state_root` argument which was computed before applying the block.


  


Co-Authored-By: hopinheimer <knmanas6@gmail.com>

testing/state_transition_vectors/src/main.rs

@@ -4,7 +4,6 @@ mod exit;
 
 use beacon_chain::test_utils::{BeaconChainHarness, EphemeralHarnessType};
 use bls::Keypair;
-use fixed_bytes::FixedBytesExtended;
 use ssz::Encode;
 use std::env;
 use std::fs::{self, File};
@@ -13,7 +12,7 @@ use std::path::{Path, PathBuf};
 use std::process::exit;
 use std::sync::LazyLock;
 use types::{BeaconState, EthSpec, SignedBeaconBlock, test_utils::generate_deterministic_keypairs};
-use types::{Hash256, MainnetEthSpec, Slot};
+use types::{MainnetEthSpec, Slot};
 
 type E = MainnetEthSpec;
 
@@ -65,7 +64,6 @@ async fn get_harness<E: EthSpec>(
         harness
             .add_attested_blocks_at_slots(
                 state,
-                Hash256::zero(),
                 (skip_to_slot.as_u64()..slot.as_u64())
                     .map(Slot::new)
                     .collect::<Vec<_>>()