[feat] Improve interpreter testing suite

Changes:

• Add a cmake function lidarview_fetch_test_data to fetch testing data using git lfs on the new lidarview-test-data repository.
• Improve ground truth generation script:
  • support interpreters without any LiDAR model choice
  • quality of life improvement
• Improve existing LidarReader & LidarStream testing suite
• Add a testing suite to check LidarInterpreters