Blender Git Loki

Cycles: Use better check for CUDA graphics interoperability

The idea is to disable graphics interoperability if the compute device
is not part of the OpenGL context.

Test setup:
- Linux Debian Testing
- RTX 6000 used as non-display compute device
- NVidia driver 460.56

The render time of very simple scene in viewport is about 17% faster
than with an interop.