Repository: opencv
Issue: CV_BGR2LAB in opencv and opencv cuda return different result.
Labels: category: gpu/cuda (contrib),needs investigation

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##### System information (version)
<!-- Example
- OpenCV => 3.4.16 with CUDA
- Operating System / Platform => ubuntu 18.04
- Compiler => g++ (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0 
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- OpenCV => 3.4.16 with CUDA 11.7 on RTX3090
- Operating System / Platform => ubuntu 18.04
- Compiler => g++ (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0 

##### Detailed description

<!-- your description -->
I found that when I use the cvtcolor to convert an image from rgb 2 lab, the results of opencv and opencv cuda are inconsistent, about 1% of the point results differ by 1.I found this issue, but nobody responses,https://github.com/opencv/opencv/issues/5982.
##### Steps to reproduce

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    ```.cpp
    // C++ code example
    ```
 or attach as .txt or .zip file
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code:
[rgb2lab_cuda_cv.txt](https://github.com/opencv/opencv/files/9655152/rgb2lab_cuda_cv.txt)
image:https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Everest_North_Face_toward_Base_Camp_Tibet_Luca_Galuzzi_2006.jpg/1280px-Everest_North_Face_toward_Base_Camp_Tibet_Luca_Galuzzi_2006.jpg
build:nvcc rgb2lab_cuda_cv.cpp -o rgb2lab $(pkg-config --libs --cflags opencv) $(pkg-config --libs --cflags cuda-11.7)
run:rgb2lab ${img}
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