More generic accounts purge functions (#14595)

Co-authored-by: Carl Lin <carl@solana.com>

runtime/src/lib.rs

@@ -13,6 +13,7 @@ mod blockhash_queue;
 pub mod bloom;
 pub mod builtins;
 pub mod commitment;
+pub mod contains;
 pub mod epoch_stakes;
 pub mod genesis_utils;
 pub mod hardened_unpack;