Add geometry file import nodes support to the for-each-path logic. This will make `bpy.data.file_path_map()` report the input files for OBJ, PLY, etc. import nodes (and any other node that has a string property of subtype `PROP_FILEPATH`). Currently this only supports static file paths, so where the file path is set as the input socket's default value. When the path is determined via any noodle, this is ignored and the default value is reported anyway. This is necessary for the new version of Blender Asset Tracer, which in turn is needed to resolve studio/flamenco#104423. Pull Request: https://projects.blender.org/blender/blender/pulls/144874