Auto find OptiX on Linux when installed in /opt
We do not need to provide OptiX path when either NVIDIA-OptiX-SDK-5.1.1-linux64
or NVIDIA-OptiX-SDK-6.5.0-linux64
are in /opt
We do not need to provide OptiX path when either NVIDIA-OptiX-SDK-5.1.1-linux64
or NVIDIA-OptiX-SDK-6.5.0-linux64
are in /opt