Particle Size Increasing with Time with OSPRay On

@mconti the fix is going through review here:
https://gitlab.kitware.com/paraview/paraview/-/merge_requests/4335

The GUI will look a lot like this:
Screenshot from 2020-08-27 21-02-09
The All Exact and Each Exact modes are new. They take the sizes directly from the PointSize/LineWidth or the supplied Scale Array respectively.

If you’ve got the time to check it out I would appreciate it.
Thanks