Fix cross compiling for ros humble

[SKG-AGudenschwager]

When building the library in cross-compiling CI over ROS Humble there is an issue with the libraries:

82.19 Starting >>> unitree_api
82.26 Starting >>> unitree_go
82.30 Starting >>> unitree_hg
97.31 --- stderr: unitree_api
97.31 CMake Error at /opt/ros/humble/share/builtin_interfaces/cmake/ament_cmake_export_libraries-extras.cmake:48 (message):
97.31   Package 'builtin_interfaces' exports the library
97.31   'builtin_interfaces__rosidl_generator_c' which couldn't be found
97.31 Call Stack (most recent call first):
97.31   /opt/ros/humble/share/builtin_interfaces/cmake/builtin_interfacesConfig.cmake:41 (include)
97.31   /opt/ros/humble/share/std_msgs/cmake/ament_cmake_export_dependencies-extras.cmake:21 (find_package)
97.31   /opt/ros/humble/share/std_msgs/cmake/std_msgsConfig.cmake:41 (include)
97.31   /opt/ros/humble/share/geometry_msgs/cmake/ament_cmake_export_dependencies-extras.cmake:21 (find_package)
97.31   /opt/ros/humble/share/geometry_msgs/cmake/geometry_msgsConfig.cmake:41 (include)
97.31   CMakeLists.txt:24 (find_package)
97.31 
97.31 
97.31 ---
97.32 Failed   <<< unitree_api [15.1s, exited with code 1]
97.33 Aborted  <<< unitree_go [15.0s]
115.0 Aborted  <<< unitree_hg [32.7s]
115.2 
115.2 Summary: 0 packages finished [35.2s]
115.2   1 package failed: unitree_api
115.2   2 packages aborted: unitree_go unitree_hg
115.2   3 packages had stderr output: unitree_api unitree_go unitree_hg
------

This is a known issue: introlab/rtabmap_ros#1288
and the same fix is applied to this library.