add ledger-tool verify verify-accounts-index option (#18375)

* add ledger-tool verify verify-accounts-index option

* comment, merge, respond to feedback, cleanup

ledger/src/bank_forks_utils.rs

@@ -140,6 +140,7 @@ fn load_from_snapshot(
         process_options.limit_load_slot_count_from_snapshot,
         process_options.shrink_ratio,
         process_options.accounts_db_test_hash_calculation,
+        process_options.verify_index,
     )
     .expect("Load from snapshot failed");
     if let Some(shrink_paths) = shrink_paths {

ledger/src/blockstore_processor.rs

@@ -377,6 +377,7 @@ pub struct ProcessOptions {
     pub limit_load_slot_count_from_snapshot: Option<usize>,
     pub allow_dead_slots: bool,
     pub accounts_db_test_hash_calculation: bool,
+    pub verify_index: bool,
     pub shrink_ratio: AccountShrinkThreshold,
 }