Move gossip modules into solana-gossip crate (#17352)

* Move gossip modules to solana-gossip

* Update Protocol abi digest due to move

* Move gossip benches and hook up CI

* Remove unneeded Result entries

* Single use statements

core/src/validator.rs

@@ -3,15 +3,9 @@
 use crate::{
     broadcast_stage::BroadcastStageType,
     cache_block_time_service::{CacheBlockTimeSender, CacheBlockTimeService},
-    cluster_info::{
-        ClusterInfo, Node, DEFAULT_CONTACT_DEBUG_INTERVAL_MILLIS,
-        DEFAULT_CONTACT_SAVE_INTERVAL_MILLIS,
-    },
     cluster_info_vote_listener::VoteTracker,
     completed_data_sets_service::CompletedDataSetsService,
     consensus::{reconcile_blockstore_roots_with_tower, Tower},
-    contact_info::ContactInfo,
-    gossip_service::GossipService,
     poh_recorder::{PohRecorder, GRACE_TICKS_FACTOR, MAX_GRACE_SLOTS},
     poh_service::{self, PohService},
     rewards_recorder_service::{RewardsRecorderSender, RewardsRecorderService},
@@ -28,6 +22,14 @@ use crate::{
 };
 use crossbeam_channel::{bounded, unbounded};
 use rand::{thread_rng, Rng};
+use solana_gossip::{
+    cluster_info::{
+        ClusterInfo, Node, DEFAULT_CONTACT_DEBUG_INTERVAL_MILLIS,
+        DEFAULT_CONTACT_SAVE_INTERVAL_MILLIS,
+    },
+    contact_info::ContactInfo,
+    gossip_service::GossipService,
+};
 use solana_ledger::{
     bank_forks_utils,
     blockstore::{Blockstore, BlockstoreSignals, CompletedSlotsReceiver, PurgeType},