bench: Match ConnectBlock tx output counts

There turned out to be a mismatch in the tx output counts which caused
'ConnectBlockMixedEcdsaSchnorr' benchmark to run slower than
'ConnectBlockAllEcdsa' and 'ConnectBlockAllSchnorr'. This commit makes
the tx output counts uniform across all benchmarks.

This commit also renames the 'taproot_tx' variable to 'tx' to reflect
that this variable represents a general tx and not just a taproot tx.

Author: monlovesmango

src/bench/connectblock.cpp

@@ -52,10 +52,10 @@ CBlock CreateTestBlock(
             inputs.emplace_back(tx_to_spend->GetHash(), j);
         }
 
-        const auto [taproot_tx, _]{test_setup.CreateValidTransaction(
+        const auto [tx, _]{test_setup.CreateValidTransaction(
             {tx_to_spend}, inputs, chainstate.m_chain.Height() + 1, keys, outputs, {}, {})};
-        txs.emplace_back(taproot_tx);
-        tx_to_spend = MakeTransactionRef(taproot_tx);
+        txs.emplace_back(tx);
+        tx_to_spend = MakeTransactionRef(tx);
     }
 
     // Coinbase output can use any output type as it is not spent and will not change the benchmark
@@ -107,16 +107,10 @@ void BenchmarkConnectBlock(benchmark::Bench& bench, std::vector<CKey>& keys, std
 static void ConnectBlockAllSchnorr(benchmark::Bench& bench)
 {
     const auto test_setup{MakeNoLogFileContext<TestChain100Setup>()};
-    auto [keys, outputs]{CreateKeysAndOutputs(test_setup->coinbaseKey, /*num_schnorr=*/4, /*num_ecdsa=*/0)};
+    auto [keys, outputs]{CreateKeysAndOutputs(test_setup->coinbaseKey, /*num_schnorr=*/5, /*num_ecdsa=*/0)};
     BenchmarkConnectBlock(bench, keys, outputs, *test_setup);
 }
 
-/**
- * This benchmark is expected to be slower than the AllSchnorr or Ecdsa benchmark
- * because it uses transactions with both Schnorr and Ecdsa signatures
- * which requires the transaction to be hashed multiple times for
- * the different signature algorithms
- */
 static void ConnectBlockMixedEcdsaSchnorr(benchmark::Bench& bench)
 {
     const auto test_setup{MakeNoLogFileContext<TestChain100Setup>()};
@@ -128,7 +122,7 @@ static void ConnectBlockMixedEcdsaSchnorr(benchmark::Bench& bench)
 static void ConnectBlockAllEcdsa(benchmark::Bench& bench)
 {
     const auto test_setup{MakeNoLogFileContext<TestChain100Setup>()};
-    auto [keys, outputs]{CreateKeysAndOutputs(test_setup->coinbaseKey, /*num_schnorr=*/0, /*num_ecdsa=*/4)};
+    auto [keys, outputs]{CreateKeysAndOutputs(test_setup->coinbaseKey, /*num_schnorr=*/0, /*num_ecdsa=*/5)};
     BenchmarkConnectBlock(bench, keys, outputs, *test_setup);
 }