Blender Git Loki

Fix T91169: bpy_extras.io_utils.create_derived_objects -> duplis error

This function now takes a depsgraph and a list of objects to avoid
inefficient O(n^2) iteration when extracting instances from all objects
in the scene. Returning an object -> instance map.

Note that keeping compatibility with the existing API wasn't practical
in this case since instances can no longer be generated from the scene
and it's objects.