'node_executable' is deprecated

See https://gitlab.com/micro-ROS/ros_tracing/ros2_tracing/-/jobs/520426054#L1730

 2: test/test_intra.py::TestIntra::test_all
 2: test/test_node.py::TestNode::test_all
 2: test/test_publisher.py::TestPublisher::test_all
 2: test/test_service.py::TestService::test_all
 2: test/test_subscription.py::TestSubscription::test_all
 2: test/test_timer.py::TestTimer::test_all
 2:   Warning: The parameter 'node_executable' is deprecated, use 'executable' instead

This is in tracetools_test's utils.py.