fix(ernie-image): avoid locals() comprehension scope issue in callback kwargs (#13478)

Author: songh11

src/diffusers/pipelines/ernie_image/pipeline_ernie_image.py

@@ -352,7 +352,9 @@ def __call__(
 
                 # Callback
                 if callback_on_step_end is not None:
-                    callback_kwargs = {k: locals()[k] for k in callback_on_step_end_tensor_inputs}
+                    callback_kwargs = {}
+                    for k in callback_on_step_end_tensor_inputs:
+                        callback_kwargs[k] = locals()[k]
                     callback_outputs = callback_on_step_end(self, i, t, callback_kwargs)
                     latents = callback_outputs.pop("latents", latents)