Define a per-year OptiX version and include symlink

Define a per-year default OptiX version and create symlink from:

```
/usr/local/include/OptiX -> /usr/local/NVIDIA-OptiX-SDK-x.y.z/include
```

Start by locating the container configuration that selects the NVIDIA OptiX SDK version. Trace how the default is chosen per year and where /usr/local/include/OptiX is created; the work is done when the versioned SDK and symlink are present in the relevant container images.

Written by the indexing model from the issue text.