Blender Git Commit Log

Geometry Nodes: simplify looping over attributes in geometry set

This adds three new methods:
* `InstancesComponent::foreach_reference_as_geometry(...)`
* `GeometrySet::attribute_foreach(...)`
* `GeometrySet::gather_attributes_for_propagation(...)`

The goal is that these iteration primitives can be used in places
where we use more specialized iterators currently.

Differential Revision: https://developer.blender.org/D12613