[CI-Daily] replace `past` in prepare inputs for generation (#21296)

replace `past` in prepare inputs for generation

src/transformers/models/encoder_decoder/modeling_encoder_decoder.py

@@ -658,9 +658,9 @@ class EncoderDecoderModel(PreTrainedModel):
         return shift_tokens_right(labels, self.config.pad_token_id, self.config.decoder_start_token_id)
 
     def prepare_inputs_for_generation(
-        self, input_ids, past=None, attention_mask=None, use_cache=None, encoder_outputs=None, **kwargs
+        self, input_ids, past_key_values=None, attention_mask=None, use_cache=None, encoder_outputs=None, **kwargs
     ):
-        decoder_inputs = self.decoder.prepare_inputs_for_generation(input_ids, past=past)
+        decoder_inputs = self.decoder.prepare_inputs_for_generation(input_ids, past_key_values=past_key_values)
         decoder_attention_mask = decoder_inputs["attention_mask"] if "attention_mask" in decoder_inputs else None
         input_dict = {
             "attention_mask": attention_mask,
@@ -679,6 +679,6 @@ class EncoderDecoderModel(PreTrainedModel):
             " model.decoder.resize_token_embeddings(...))"
         )
 
-    def _reorder_cache(self, past, beam_idx):
+    def _reorder_cache(self, past_key_values, beam_idx):
         # apply decoder cache reordering here
-        return self.decoder._reorder_cache(past, beam_idx)
+        return self.decoder._reorder_cache(past_key_values, beam_idx)