add cuda compiler for CMake tests of CUDA-enabled libtorch

Author: h-vetinari

recipe/meta.yaml

@@ -208,6 +208,7 @@ test:
     # cmake needs a compiler to run package detection, see
     # https://discourse.cmake.org/t/questions-about-find-package-cli-msvc/6194
     - {{ compiler('cxx') }}
+    - {{ compiler('cuda') }}    # [cuda_compiler_version != "None"]
     - cmake
     - ninja
     - pkg-config