Add the .label files of the semantic segmentation provided by Carla's lidar

[DavideCoppola97]

Hi, thank you very much for your work, it will be very useful to me. I would like to ask you if it was possible to also add automatic creation of .label files (as in the SemanticKitty dataset) created using the '' perfect '' segmentation data provided by carla.SemanticLidarMeasurement (I believe this feature was added since carla 0.9.10 onwards : https://carla.readthedocs.io/en/0.9.10/ref_sensors/#semantic-lidar-sensor )