Blender Git Loki

Curve: Force pretesselate modifier to output a Mesh output

This is to improve the case of T71055 where curves share the same batch
cache when they shouldn't.

This however, does not help to fix edit mode display.

The real fix would be to have a similar handling to what the mesh modifiers
do and duplicate the whole Curve data. But this is too much work/change for
the 2.83 release.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D7569