cli for num account index bins (#19085)

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,
-        None,
+        process_options.accounts_index_bins,
     )
     .expect("Load from snapshot failed");
 

ledger/src/blockstore_processor.rs

@@ -385,6 +385,7 @@ pub struct ProcessOptions {
     pub allow_dead_slots: bool,
     pub accounts_db_test_hash_calculation: bool,
     pub accounts_db_skip_shrink: bool,
+    pub accounts_index_bins: Option<usize>,
     pub verify_index: bool,
     pub shrink_ratio: AccountShrinkThreshold,
 }
@@ -416,7 +417,7 @@ pub fn process_blockstore(
         opts.accounts_db_caching_enabled,
         opts.shrink_ratio,
         false,
-        None, // later, this will be passed from ProcessOptions
+        opts.accounts_index_bins,
     );
     let bank0 = Arc::new(bank0);
     info!("processing ledger for slot 0...");