[ROS-O] Fix build error with Boost 1.83

[furushchev]

The boost::filesystem::path::append function defined in the src/nodelet/face_recognition_nodelet.cpp have conflict with the boost function.
In this PR, I removed the function and expanded the content to the only called place (in the user_expanded_path function).

In addition to that, I fixed the cmake warning:

Warnings   << opencv_apps:cmake /var/runner/catkin_ws/logs/opencv_apps/build.cmake.000.log                                                                                                             
CMake Warning (dev) in CMakeLists.txt:
  A logical block opening on the line

    /var/runner/catkin_ws/src/opencv_apps/CMakeLists.txt:5 (if)

  closes on the line

    /var/runner/catkin_ws/src/opencv_apps/CMakeLists.txt:16 (endif)

  with mis-matching arguments.
This warning is for project developers.  Use -Wno-dev to suppress it.

[furushchev]

I successfully built the package on Ubuntu 20.04 / Noetic and Ubuntu 24.04 / One while the CI failed...

[furushchev]

@k-okada Hello! I'm wondering what is the current situation of the maintenance in this repository.
Am I opening the pull request in the right place? Or should I request to copy the repository under the ros-o organization for creating this kind of pull request? Thank you in advance!

[k-okada]

Thanks you!!!
I have merged with patches to fixed CI and add ROS-O noble test #147

[furushchev]

@k-okada Thank you for your quick merge!