Add GpuMat::locateROI test case

[cudawarped]

Main PR: opencv/opencv#21555

Test case for GpuMat::locateROI() added to check GpuMat::dataend calculation.

Dependant on opencv/opencv#21555.

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force_builders=Custom
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[cudawarped]

Sorry I still don't understand. Is it the naming used depth vs type or the fact that cuda_test.xpp is in the opencv repo and test_gpumat.cpp is in the contrib repo?

To clarify unless I am missing something

CUDA_TEST_P(GpuMat_LocateROI, locateROI)
has
GpuMat src = createMat(size, depth, wholeSizeGold, ofsGold, useRoi);
which uses createMat() defined in cuda_test.hpp as
cv::cuda::GpuMat createMat(cv::Size size, int type, cv::Size& size0, cv::Point& ofs, bool useRoi = false);
and declared in cuda_test.cpp.

This looks good to me, what error is gcc 9 reporting?