Fix #109209: crash when attributes are propagated to non-first output geometry

This wasn't covered by my other tests because in usually the geometry output
that anonymous attributes are propagated to is the first output, thus the index
was 0. In this case it didn't make it difference whether the `.index_range()` call
was there are not.

source/blender/nodes/intern/geometry_nodes_lazy_function.cc

@@ -1843,7 +1843,7 @@ struct GeometryNodesLazyFunctionGraphBuilder {
     }
 
     for (const int caller_propagation_index :
-         attribute_inferencing_.propagated_output_geometry_indices)
+         attribute_inferencing_.propagated_output_geometry_indices.index_range())
     {
       const int group_output_index =
           attribute_inferencing_.propagated_output_geometry_indices[caller_propagation_index];