test: Move P2WSH_OP_TRUE to shared test library

src/test/util/script.h

@@ -0,0 +1,21 @@
+// Copyright (c) 2021 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_TEST_UTIL_SCRIPT_H
+#define BITCOIN_TEST_UTIL_SCRIPT_H
+
+#include <crypto/sha256.h>
+#include <script/script.h>
+
+static const std::vector<uint8_t> WITNESS_STACK_ELEM_OP_TRUE{uint8_t{OP_TRUE}};
+static const CScript P2WSH_OP_TRUE{
+    CScript{}
+    << OP_0
+    << ToByteVector([] {
+           uint256 hash;
+           CSHA256().Write(WITNESS_STACK_ELEM_OP_TRUE.data(), WITNESS_STACK_ELEM_OP_TRUE.size()).Finalize(hash.begin());
+           return hash;
+       }())};
+
+#endif // BITCOIN_TEST_UTIL_SCRIPT_H