Fix CUDA Architecture for CI with old CMake
The configuration for CI changed to using the newer CMake option
CMAKE_CUDA_ARCHITECTURES
for turing builds instead of the now
depreciated VTKm_CUDA_Architecture
setting. However, this new
setting only works for newer versions of CMake, and some of the
CI docker images still have older versions of CMake.
This happened to work on the CI because the CI was run on
machines that had the right CUDA device installed (I guess), but
did not work with the reproduce_ci_env.py
utility. Fix this
by checking the CMake version first.