support tqdm in notebooks (#7510)

vllm/entrypoints/llm.py

 from contextlib import contextmanager
 from typing import ClassVar, List, Optional, Sequence, Union, cast, overload
 
-from tqdm import tqdm
+from tqdm.auto import tqdm
 from transformers import PreTrainedTokenizer, PreTrainedTokenizerFast
 
 from vllm.engine.arg_utils import EngineArgs