增加對tokenizer.chat_template的支援

tokenizer_config.json

@@ -3,6 +3,7 @@
   "remove_space": false,
   "do_lower_case": false,
   "tokenizer_class": "ChatGLMTokenizer",
+  "chat_template": "{% for message in messages %}{% if loop.first %}[gMASK]sop<|{{ message['role'] }}|> \n {{ message['content'] }}{% else %}<|{{ message['role'] }}|> \n {{ message['content'] }}{% endif %}{% endfor %}{% if add_generation_prompt %}<|assistant|>{% endif %}",
   "auto_map": {
     "AutoTokenizer": [
       "tokenization_chatglm.ChatGLMTokenizer",