CHIA-3768 Optimize constructing removal names in new_peak's slow path (#20113)

Optimize constructing removal names in new_peak's slow path.

Author: AmineKhaldi

chia/full_node/mempool_manager.py

@@ -934,8 +934,7 @@ async def new_peak(
 
             removals: set[bytes32] = set()
             for item in old_pool.all_items():
-                for s in item.spend_bundle.coin_spends:
-                    removals.add(s.coin.name())
+                removals.update(item.bundle_coin_spends)
 
             for record in await self.get_coin_records(removals):
                 name = record.coin.name()