Blender Git Loki

Geometry Nodes: Small improvements to object info node

This commit contains a few mostly-related changes to this node:
- Add a warning when retrieving the geometry from the modifier object.
- Only create the output geometry when it is necessary.
- Decompose transform matrices in a more friendly way.
- Use default return callbacks like other newer nodes.

Differential Revision: https://developer.blender.org/D13232