video(DISOpticalFlow): update OpenCL implementation (#14473) * video(DIS): add code for profiling * video(DIS): fix test parameters * video(DIS): simplify OpenCL kernels - parameters -> defines - avoid float3 - const / local scope - improve readability, replace Kernel::set() -> args() * video(DIS): use CV_32FC2 buffers
* moved DIS optical flow from opencv_contrib to opencv, moved TVL1 from opencv to opencv_contrib * fixed compile warning * TVL1 optical flow example moved to opencv_contrib