Merge pull request #24045 from TolyaTalamanov:at/add-onnx-directml-execution-provider

G-API: Support DirectML Execution Provider for ONNXRT Backend #24045

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [ ] I agree to contribute to the project under Apache 2 License.
- [ ] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [ ] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/gapi/misc/python/pyopencv_gapi.hpp

@@ -30,6 +30,7 @@ using map_string_and_vector_size_t  = std::map<std::string, std::vector<size_t>>
 using map_string_and_vector_float   = std::map<std::string, std::vector<float>>;
 using map_int_and_double            = std::map<int, double>;
 using ep_OpenVINO                   = cv::gapi::onnx::ep::OpenVINO;
+using ep_DirectML                   = cv::gapi::onnx::ep::DirectML;
 
 // NB: Python wrapper generate T_U for T<U>
 // This behavior is only observed for inputs