Move block-time caching earlier (#17109)

* Require that blockstore block-time only be recognized slot, instead of root

* Move cache_block_time to after Bank freeze

* Single use statement

* Pass transaction_status_sender by reference

* Remove unnecessary slot-existence check before caching block time altogether

* Move block-time existence check into Blockstore::cache_block_time, Blockstore no longer needed in blockstore_processor helper

core/src/validator.rs

@@ -1119,7 +1119,10 @@ fn new_banks_from_ledger(
         process_options,
         transaction_history_services
             .transaction_status_sender
-            .clone(),
+            .as_ref(),
+        transaction_history_services
+            .cache_block_time_sender
+            .as_ref(),
     )
     .unwrap_or_else(|err| {
         error!("Failed to load ledger: {:?}", err);