fuzz: Speed up *_package_eval fuzz targets a bit

Author: MarcoFalke

src/test/fuzz/package_eval.cpp

@@ -201,7 +201,7 @@ FUZZ_TARGET(ephemeral_package_eval, .init = initialize_tx_pool)
 
     // All RBF-spendable outpoints outside of the unsubmitted package
     std::set<COutPoint> mempool_outpoints;
-    std::map<COutPoint, CAmount> outpoints_value;
+    std::unordered_map<COutPoint, CAmount, SaltedOutpointHasher> outpoints_value;
     for (const auto& outpoint : g_outpoints_coinbase_init_mature) {
         Assert(mempool_outpoints.insert(outpoint).second);
         outpoints_value[outpoint] = 50 * COIN;
@@ -356,7 +356,7 @@ FUZZ_TARGET(tx_package_eval, .init = initialize_tx_pool)
 
     // All RBF-spendable outpoints outside of the unsubmitted package
     std::set<COutPoint> mempool_outpoints;
-    std::map<COutPoint, CAmount> outpoints_value;
+    std::unordered_map<COutPoint, CAmount, SaltedOutpointHasher> outpoints_value;
     for (const auto& outpoint : g_outpoints_coinbase_init_mature) {
         Assert(mempool_outpoints.insert(outpoint).second);
         outpoints_value[outpoint] = 50 * COIN;