Use option for account index bucket parameter (#19150)

ledger/src/bank_forks_utils.rs

@@ -132,7 +132,7 @@ fn load_from_snapshot(
         process_options.accounts_db_test_hash_calculation,
         process_options.accounts_db_skip_shrink,
         process_options.verify_index,
-        solana_runtime::accounts_index::BINS_DEFAULT,
+        None,
     )
     .expect("Load from snapshot failed");
 

ledger/src/blockstore_processor.rs

@@ -416,7 +416,7 @@ pub fn process_blockstore(
         opts.accounts_db_caching_enabled,
         opts.shrink_ratio,
         false,
-        solana_runtime::accounts_index::BINS_DEFAULT,
+        None, // later, this will be passed from ProcessOptions
     );
     let bank0 = Arc::new(bank0);
     info!("processing ledger for slot 0...");