OpenVR problems with VTK 9.2

[codeling]

@LucasGandel

TBH I have no idea, the code was there in tests since the 1st commit that introduced OpenVR support in VTK

What I’m wondering here is then why this was working for us without the workaround of removing the last culler for VTK < 9.2…
Also the volume cutting problem is new - with VTK 9.1 it worked as expected.

Maybe using vtkCameraActor/vtkFrustumSource could help to confirm that the camera frustum planes are computed correctly for the VR camera.

If I have time I might look into it, thanks for the pointers!