Merge topic 'ospray_light_paraview' into paraview/release

c5f888fc OSPRay: ambient light switch status

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Reviewed-by: Cory Quammen <cory.quammen@kitware.com>
Merge-request: !11780