fix(sync): Prevent state sync from being terminally verbose (#7864)

`new_shard_sync` can be huge. Printing the whole object makes no sense.

cc: @posvyatokum

chain/client/src/sync.rs

@@ -1223,7 +1223,7 @@ impl StateSync {
         state_split_scheduler: &dyn Fn(StateSplitRequest),
     ) -> Result<StateSyncResult, near_chain::Error> {
         let _span = tracing::debug_span!(target: "sync", "run", sync = "StateSync").entered();
-        debug!(target: "sync", %sync_hash, ?new_shard_sync, ?tracking_shards, "syncing state");
+        debug!(target: "sync", %sync_hash, ?tracking_shards, "syncing state");
         let prev_hash = *chain.get_block_header(&sync_hash)?.prev_hash();
         let now = Clock::utc();