cuda_canny : multi stream safety (#11483)
* CUDA_ImgProc/Canny Asynchronous test
* cuda_canny : multi stream safety (1/3)
- Convert global variable canny::counter to class local variable
* cuda_canny : multi stream safety (2/3)
- Use texture objects rather than texture reference for cc >= 3.0,
since texture reference must be declared as a static global variable
which results in race condition when ran concurrently
* cuda_canny : multi stream safety (3/3)
- Refrain from using global variable in row_filter and column_filter
(converts column_filter::c_kernel and row_filter::c_kernel to local
variables)
* Fixes#11193
ed86bd34b1