When exporting without a `root_prim_path` set, the unit and orientation settings are applied in a slightly different way. Add coverage for these cases. Pull Request: https://projects.blender.org/blender/blender/pulls/139468
When exporting without a `root_prim_path` set, the unit and orientation settings are applied in a slightly different way. Add coverage for these cases. Pull Request: https://projects.blender.org/blender/blender/pulls/139468