modify dict include none to aviod pir dytostatic bug in while op (#8898)

* modify dict include none

* recover

Author: xiaoguoguo626807

paddlenlp/experimental/transformers/generation_utils.py

@@ -172,7 +172,8 @@ def generate(
         model_kwargs["frequency_score"] = frequency_score
         model_kwargs["presence_score"] = presence_score
         model_kwargs["logits_processors"] = logits_processors or LogitsProcessorList()
-        model_kwargs["pre_caches"] = pre_caches
+        if pre_caches is not None:
+            model_kwargs["pre_caches"] = pre_caches
 
         ret = self.sample(
             input_ids,
@@ -282,7 +283,8 @@ def sample(
 
         # let inputs_embeds enter into model_kwargs.
         # because the code below directly use the model_kwargs as a parameter without using inputs_embeds.
-        model_kwargs["inputs_embeds"] = inputs_embeds
+        if inputs_embeds is not None:
+            model_kwargs["inputs_embeds"] = inputs_embeds
         model_kwargs["all_input_ids"] = input_ids
         logits_processors = model_kwargs.pop("logits_processors")