Blender Git Loki

Geometry Nodes: Add geometry instances data to the spreadsheet

This patch adds data about instances generated by geometry nodes
to the spreadsheet. The transform data is decomposed into position,
rotation, and scale, and there is a name column to display the name
of the instanced object or collection.

This data is implemented specifically for the spreadsheet, because
we're not sure that we want to expose this data as attributes for the
use elsewhere.

Differential Revision: https://developer.blender.org/D10770