`test_components_with_different_read_write_freq_on_activate` is flaky

[christophfroehlich]

Describe the bug
I've seen that several times now

       [  FAILED  ] ResourceManagerTestReadWriteDifferentReadWriteRate.test_components_with_different_read_write_freq_on_activate
      
       1 FAILED TEST
      -- run_test.py: return code 1
      -- run_test.py: inject classname prefix into gtest result file '/__w/ros2_control/ros2_control/ros_ws/build/hardware_interface_testing/test_results/hardware_interface_testing/test_resource_manager.gtest.xml'
      -- run_test.py: verify result file '/__w/ros2_control/ros2_control/ros_ws/build/hardware_interface_testing/test_results/hardware_interface_testing/test_resource_manager.gtest.xml'
    >>>
  build/hardware_interface_testing/test_results/hardware_interface_testing/test_resource_manager.gtest.xml: 37 tests, 0 errors, 1 failure, 0 skipped
  - hardware_interface_testing.ResourceManagerTestReadWriteDifferentReadWriteRate test_components_with_different_read_write_freq_on_activate (/__w/ros2_control/ros2_control/ros_ws/src/7bc97pf9da/ros2_control/hardware_interface_testing/test/test_resource_manager.cpp:1872)
    <<< failure message
      /__w/ros2_control/ros2_control/ros_ws/src/7bc97pf9da/ros2_control/hardware_interface_testing/test/test_resource_manager.cpp:1851
      Expected equality of these values:
        state_itfs[1].get_optional().value()
          Which is: 180
        prev_system_state_value
          Which is: 170
    >>>

To Reproduce
https://github.com/ros-controls/ros2_control/actions/runs/14502517212/job/40685270864?pr=2183