test: Provide path to bitcoin binary

Set new `BitcoinTestFramework.binary_paths.bitcoin_bin` property with path to
the `bitcoin` wrapper binary. This allows new tests for `bitcoin-mine` in
#30437 and `bitcoin-cli` in #32297 to find the `bitcoin` binary and call
`bitcoin -m` to start nodes with IPC support. This way the new tests can run
whenever the ENABLE_IPC build option is enabled, instead of only running when
the `BITCOIN_CMD` environment variable is set to `bitcoin -m`

Author: ryanofsky

.github/workflows/ci.yml

@@ -275,6 +275,7 @@ jobs:
         if: matrix.job-type == 'standard'
         working-directory: build
         env:
+          BITCOIN_BIN: '${{ github.workspace }}\build\bin\Release\bitcoin.exe'
           BITCOIND: '${{ github.workspace }}\build\bin\Release\bitcoind.exe'
           BITCOINCLI: '${{ github.workspace }}\build\bin\Release\bitcoin-cli.exe'
           BITCOINTX: '${{ github.workspace }}\build\bin\Release\bitcoin-tx.exe'

test/functional/test_framework/test_framework.py

@@ -278,13 +278,16 @@ def get_binary_paths(self):
 
         paths = types.SimpleNamespace()
         binaries = {
+            "bitcoin": "BITCOIN_BIN",
             "bitcoind": "BITCOIND",
             "bitcoin-cli": "BITCOINCLI",
             "bitcoin-util": "BITCOINUTIL",
             "bitcoin-tx": "BITCOINTX",
             "bitcoin-chainstate": "BITCOINCHAINSTATE",
             "bitcoin-wallet": "BITCOINWALLET",
         }
+        # Set paths to bitcoin core binaries allowing overrides with environment
+        # variables.
         for binary, env_variable_name in binaries.items():
             default_filename = os.path.join(
                 self.config["environment"]["BUILDDIR"],