CUDA HOG does not expose detect methods to other languages

[c-x-berger]

System information (version)

• OpenCV => 4.1.0
• Operating System / Platform => Ubuntu 18.04 on Jetson Nano
• Compiler => ❔

Detailed description

The cv::cuda::HOG class doesn't expose the detect and detectMultiScale methods to other languages (Java, Python, etc.) I think this is due to these methods missing a CV_WRAP in cudaobjdetect.hpp, however, I'm not a C++ expert so I wasn't sure about it.

Steps to reproduce

import cv2
gpu_hog = cv2.cuda.HOG_create()
gpu_hog.setSVMDetector(gpu_hog.getDefaultPeopleDetector())
gpu_hog.detectMultiScale() # it doesn't matter that we're missing parameters, this will AttributeError