Revert "workflow: remove cuda"

This reverts commit 947b6ed.

Reason: While it takes ages to complete, we do actually rarely have changes to master the fully fledged artifacts can be of use to users that always want to run git master builds without having to self compile.

.github/workflows/w2x-runner.yml

@@ -17,12 +17,14 @@ jobs:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@master
+    - name: cuda-dep-install
+      run: choco install cuda
     - name: opencv-dep-install
       run: choco install opencv
     - name: opencl-dep-install
       run: git clone https://github.com/KhronosGroup/OpenCL-Headers opencl
     - name: cmake
-      run: mkdir _build && cd _build && cmake .. -DCMAKE_BUILD_TYPE=Release -DENABLE_UNICODE=ON -DCMAKE_GENERATOR="Visual Studio 16 2019" -A x64 -DOPENCV_PREFIX="C:/tools/opencv/build" -DOpenCL_INCLUDE_DIR="../opencl/"
+      run: mkdir _build && cd _build && cmake .. -DCMAKE_BUILD_TYPE=Release -DENABLE_UNICODE=ON -DCMAKE_GENERATOR="Visual Studio 16 2019" -A x64 -DOPENCV_PREFIX="C:/tools/opencv/build" -DOpenCL_INCLUDE_DIR="../opencl/" -DCUDA_TOOLKIT_ROOT_DIR="C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v10.1"
       shell: cmd
     - name: msbuild
       run: |