Blender Git Loki

Fix T74499: Add visibility checks to Face Sets creation operations

Create face sets by visibility needs to check if all face sets of a
vertex are visible to set the new face set. I renamed the functions to
make this more cleare in the API.

I also added a visibility check when creating by mask to avoid modifying
hidden areas.

Reviewed By: brecht

Maniphest Tasks: T74499

Differential Revision: https://developer.blender.org/D7048