[rpc] util: add deriveaddresses method

test/functional/test_runner.py

@@ -181,6 +181,8 @@ BASE_SCRIPTS = [
     'feature_filelock.py',
     'p2p_unrequested_blocks.py',
     'feature_includeconf.py',
+    'rpc_deriveaddresses.py',
+    'rpc_deriveaddresses.py --usecli',
     'rpc_scantxoutset.py',
     'feature_logging.py',
     'p2p_node_network_limited.py',