Fix indentation bug in SmolVLM image processor causing KeyError (#39452)
Fix indentation bug in Idefics3 image processor
- Fix KeyError when do_image_splitting=False
- Move split_images_grouped assignment inside loop
- Ensures all image shapes are stored, not just the last one
- This fixes the bug in both Idefics3 and generated SmolVLM processors
cc @yonigozlan
Co-authored-by: Krishnan Vignesh <krishnanvignesh@Krishnans-MacBook-Air.local>