perf: test-based metrics collection strategy
core/ocl: added perf test infra + "Add" perf test
added cv::warpPerspective to T-API
added cv::warpAffine to T-API
added cv::remap to T-API
added OCL-TAPI arithm tests
added cv::pow to T-API
added setIdentity to T-API
added cv::transpose to T-API
added cv::cartToPolar to T-API
added cv::polarToCart to T-API
added cv::compare to T-API
added cv::repeat to T-API (fix for copyTo -> UMat is needed)
added cv::countNonZero to T-API
added cv::sum to T-API
added cv::meanStdDev to T-API
ability to use cv::PSNR with transparent cv::norm
refactoring
Merge pull request #1902 from ilya-lavrenov:tapi_arithm
Merge pull request #1903 from ilya-lavrenov:tapi_warp