refactor: move image processors to separate files (#4229)

benchmark/mmmu/data_utils.py

@@ -143,6 +143,7 @@ def process_single_sample(data):
 
 # DATA SAVING
 def save_json(filename, ds):
+    print(f"answers saved to: {filename}")
     os.makedirs(os.path.dirname(filename), exist_ok=True)
     with open(filename, "w") as f:
         json.dump(ds, f, indent=4)