[CI ] Remove past in favor of pat_key_values (#21443)

* fix past renamed to past_key_value

* update more `past`that were ski^êd

* fixup

* remove changes made to rag

* refactor `_reorder_cache` to use `past_key_values`

* fix git `prepare_inputs_for_generation` to pass tests when false is needed in use_cache

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/modeling_{{cookiecutter.lowercase_modelname}}.py

@@ -1180,9 +1180,9 @@ class {{cookiecutter.camelcase_modelname}}ForCausalLM({{cookiecutter.camelcase_m
 
         return {"input_ids": input_ids, "attention_mask": attention_mask, "past_key_values": past_key_values}
 
-    def _reorder_cache(self, past, beam_idx):
+    def _reorder_cache(self, past_key_values, beam_idx):
         reordered_past = ()
-        for layer_past in past:
+        for layer_past in past_key_values:
             reordered_past += (tuple(past_state.index_select(0, beam_idx) for past_state in layer_past[:2]) + layer_past[2:],)
         return reordered_past
 
@@ -2905,9 +2905,9 @@ class {{cookiecutter.camelcase_modelname}}ForConditionalGeneration({{cookiecutte
         }
 
     @staticmethod
-    def _reorder_cache(past, beam_idx):
+    def _reorder_cache(past_key_values, beam_idx):
         reordered_past = ()
-        for layer_past in past:
+        for layer_past in past_key_values:
             reordered_past += (tuple(past_state.index_select(0, beam_idx) for past_state in layer_past),)
         return reordered_past
 
@@ -3344,9 +3344,9 @@ class {{cookiecutter.camelcase_modelname}}ForCausalLM({{cookiecutter.camelcase_m
         }
 
     @staticmethod
-    def _reorder_cache(past, beam_idx):
+    def _reorder_cache(past_key_values, beam_idx):
         reordered_past = ()
-        for layer_past in past:
+        for layer_past in past_key_values:
             reordered_past += (tuple(past_state.index_select(0, beam_idx) for past_state in layer_past),)
         return reordered_past
 {% endif -%}