Refactor packet deduplication and harden bench test (#22080)

core/src/lib.rs

@@ -31,6 +31,7 @@ pub mod latest_validator_votes_for_frozen_banks;
 pub mod ledger_cleanup_service;
 pub mod optimistic_confirmation_verifier;
 pub mod outstanding_requests;
+pub mod packet_deduper;
 pub mod packet_hasher;
 pub mod progress_map;
 pub mod qos_service;