Persist cost table to blockstore (#18123)

* Add `ProgramCosts` Column Family to blockstore, implement LedgerColumn; add `delete_cf` to Rocks
* Add ProgramCosts to compaction excluding list alone side with TransactionStatusIndex in one place: `excludes_from_compaction()`

* Write cost table to blockstore after `replay_stage` replayed active banks; add stats to measure persist time
* Deletes program from `ProgramCosts` in blockstore when they are removed from cost_table in memory
* Only try to persist to blockstore when cost_table is changed.
* Restore cost table during validator startup

* Offload `cost_model` related operations from replay main thread to dedicated service thread, add channel to send execute_timings between these threads;
* Move `cost_update_service` to its own module; replay_stage is now decoupled from cost_model.

core/src/lib.rs

@@ -20,6 +20,7 @@ pub mod completed_data_sets_service;
 pub mod consensus;
 pub mod cost_model;
 pub mod cost_tracker;
+pub mod cost_update_service;
 pub mod execute_cost_table;
 pub mod fetch_stage;
 pub mod fork_choice;