feat(token_limit): limit input token < 131072

4.max_tokens=131072，input＜131072时不报错
5. 输入长度超过131072时，报错，且报错内容含有以下字符串，以便被网关识别
"is longer than the model's context length"

python/sglang/srt/managers/tokenizer_manager.py

@@ -797,7 +797,7 @@ class TokenizerManager(TokenizerCommunicatorMixin, TokenizerManagerMultiItemMixi
 
         # Validate input length
         if input_token_num >= self.context_len:
-            if self.server_args.allow_auto_truncate:
+            if False:
                 logger.warning(
                     f"The input ({input_token_num} tokens) is longer than the "
                     f"model's context length ({self.context_len} tokens). "
@@ -818,7 +818,7 @@ class TokenizerManager(TokenizerCommunicatorMixin, TokenizerManagerMultiItemMixi
             and max_new_tokens is not None
             and (max_new_tokens + input_token_num) >= _max_req_len
         ):
-            if self.server_args.allow_auto_truncate:
+            if True:
                 logger.warning(
                     f"Requested token count ({input_token_num} input + {max_new_tokens} new) "
                     f"exceeds the model's context length ({self.context_len} tokens). "