FindCUDA: Create output dir while compiling intermediate link file (#15016)

During compilation of the intermediate link file, the output directory
may not be present in Visual Studio builds.  This fix makes sure the
output directory exists before generating the output file.

Suggested-by: Irwin Zaid

Modules/FindCUDA.cmake

@@ -1585,10 +1585,12 @@ function(CUDA_LINK_SEPARABLE_COMPILATION_OBJECTS output_file cuda_target options
         COMMENT "Building NVCC intermediate link file ${output_file_relative_path}"
         )
     else()
+      get_filename_component(output_file_dir "${output_file}" DIRECTORY)
       add_custom_command(
         TARGET ${cuda_target}
         PRE_LINK
         COMMAND ${CMAKE_COMMAND} -E echo "Building NVCC intermediate link file ${output_file_relative_path}"
+        COMMAND ${CMAKE_COMMAND} -E make_directory "${output_file_dir}"
         COMMAND ${CUDA_NVCC_EXECUTABLE} ${nvcc_flags} ${flags} -dlink ${object_files} -o "${output_file}"
         )
     endif()