Timeout of test_gravity_compensation

   build/control_toolbox/Testing/20250606-0454/Test.xml: 12 tests, 0 errors, 1 failure, 0 skipped
  - test_gravity_compensation
    <<< failure message
      -- run_test.py: invoking following command in '/__w/control_toolbox/control_toolbox/ros_ws/build/control_toolbox':
       - /__w/control_toolbox/control_toolbox/ros_ws/build/control_toolbox/test_gravity_compensation --ros-args --params-file /__w/control_toolbox/control_toolbox/ros_ws/src/1xaembwftwn/control_toolbox/control_toolbox/test/control_filters/test_gravity_compensation_parameters.yaml -- --gtest_output=xml:/__w/control_toolbox/control_toolbox/ros_ws/build/control_toolbox/test_results/control_toolbox/test_gravity_compensation.gtest.xml
      [==========] Running 5 tests from 1 test suite.
      [----------] Global test environment set-up.
      [----------] 5 tests from GravityCompensationTest
      [ RUN      ] GravityCompensationTest.TestGravityCompensationFilterThrowsUnconfigured
    >>>
  build/control_toolbox/test_results/control_toolbox/test_gravity_compensation.gtest.xml: 1 test, 1 error, 0 failures, 0 skipped
  - control_toolbox test_gravity_compensation.gtest.missing_result
    <<< error message
      The test did not generate a result file.
    >>>

https://github.com/ros-controls/control_toolbox/issues/384

Start with the failing test executable test_gravity_compensation and its parameter file, test/control_filters/test_gravity_compensation_parameters.yaml. Read issue #384 for context, then reproduce the timeout and inspect why TestGravityCompensationFilterThrowsUnconfigured does not produce a result file; done means all five tests complete and the gtest XML is generated.