cmake CMAKE_CUDA_STANDARD examples

NERSC/timemory cmake/Modules/Packages.cmake :422 

target_compile_features(timemory-headers
                                INTERFACE cuda_std_${CMAKE_CUDA_STANDARD})

STEllAR-GROUP/hpx cmake/HPX_SetupCUDA.cmake :56 

target_compile_features(Cuda::cuda INTERFACE cuda_std_${CMAKE_CUDA_STANDARD})