Sets EpochAccountsHash to Valid in accounts bench (#34420)

Sets EAH to Valid in accounts bench

runtime/benches/accounts.rs

@@ -15,6 +15,7 @@ use {
         },
         accounts_index::{AccountSecondaryIndexes, ScanConfig},
         ancestors::Ancestors,
+        epoch_accounts_hash::EpochAccountsHash,
         rent_collector::RentCollector,
     },
     solana_runtime::bank::*,
@@ -70,6 +71,15 @@ fn test_accounts_squash(bencher: &mut Bencher) {
     deposit_many(&prev_bank, &mut pubkeys, 250_000).unwrap();
     prev_bank.freeze();
 
+    // Need to set the EAH to Valid so that `Bank::new_from_parent()` doesn't panic during
+    // freeze when parent is in the EAH calculation window.
+    prev_bank
+        .rc
+        .accounts
+        .accounts_db
+        .epoch_accounts_hash_manager
+        .set_valid(EpochAccountsHash::new(Hash::new_unique()), 0);
+
     // Measures the performance of the squash operation.
     // This mainly consists of the freeze operation which calculates the
     // merkle hash of the account state and distribution of fees and rent