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

ledger-tool/src/main.rs

@@ -703,6 +703,7 @@ fn load_bank_forks(
         snapshot_config.as_ref(),
         process_options,
         None,
+        None,
     )
 }