When importing an STL file with the "Scene Unit" option enabled, we
should divide by the Unit Scale instead of multiply (which was already
done when Exporting with "Unit Scale" enabled)
The PLY importer had the same issue.
The prior "legacy" implementation did this correctly:
b42d686277/io_mesh_stl/__init__.py (L110)
Co-authored-by: Jesse Yurkovich <jesse.y@gmail.com>
Pull Request: https://projects.blender.org/blender/blender/pulls/124718