refactor: let excel use lazy image loader (#13558)

### What problem does this PR solve?

let excel use lazy image loader

### Type of change

- [x] Refactoring

---------

Co-authored-by: Yingfeng <yingfeng.zhang@gmail.com>

deepdoc/parser/figure_parser.py

@@ -75,7 +75,7 @@ def vision_figure_parser_figure_xlsx_wrapper(images,callback=None, **kwargs):
         vision_model = None
     if vision_model:
         figures_data = [((
-                        img["image"],   # Image.Image
+                        img["image"],   # Image.Image or LazyImage (converted by ensure_pil_image)
                         [img["image_description"]]     # description list (must be list)
                     ),
                     [