Chameleon can now be compiled with cuda 12.x

Hello,

This merge request is to fix the issue #117 (closed)

Cuda 12.x does not allow the inclusion of cublas.h and cublas_v2.h. "Disallow including cublas.h and cublas_v2.h in the same translation unit." (https://docs.nvidia.com/cuda/cuda-toolkit-release-notes/index.html#cublas-release-12-0)

Since cublas.h is deprecated since version 4 of cuda, it must now be the minimum version to use and now cublas_v2.h only is used.

Best regards, Nathan Précigout.