test: Treat `bitcoin-wallet` binary in the same way as others

This change makes the `bitcoin-wallet` binary path customizable in the
same way how it can be done now with other ones, including `bitcoind`,
`bitcoin-cli` and `bitcoin-util`.

test/functional/test_framework/test_framework.py

@@ -235,6 +235,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
             "bitcoind": ("bitcoind", "BITCOIND"),
             "bitcoin-cli": ("bitcoincli", "BITCOINCLI"),
             "bitcoin-util": ("bitcoinutil", "BITCOINUTIL"),
+            "bitcoin-wallet": ("bitcoinwallet", "BITCOINWALLET"),
         }
         for binary, [attribute_name, env_variable_name] in binaries.items():
             default_filename = os.path.join(

test/functional/tool_wallet.py

@@ -32,12 +32,11 @@ class ToolWalletTest(BitcoinTestFramework):
         self.skip_if_no_wallet_tool()
 
     def bitcoin_wallet_process(self, *args):
-        binary = self.config["environment"]["BUILDDIR"] + '/src/bitcoin-wallet' + self.config["environment"]["EXEEXT"]
         default_args = ['-datadir={}'.format(self.nodes[0].datadir), '-chain=%s' % self.chain]
         if not self.options.descriptors and 'create' in args:
             default_args.append('-legacy')
 
-        return subprocess.Popen([binary] + default_args + list(args), stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+        return subprocess.Popen([self.options.bitcoinwallet] + default_args + list(args), stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
 
     def assert_raises_tool_error(self, error, *args):
         p = self.bitcoin_wallet_process(*args)