[Frontend] Expose revision arg in OpenAI server

[lewtun]

This PR exposes the revision arg in the OpenAPI server so that one can run inference at a desired model revision via:

vllm serve {MODEL_ID} --revision {REVISION}

In particular, it resolves the following error that arises when passing --revision to vllm serve for model repos that do not have a config.json file on the main branch (a common pattern among HF Hub users who use branches for versioning experiments):

Traceback (most recent call last):
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/utils/_errors.py", line 304, in hf_raise_for_status
    response.raise_for_status()
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/requests/models.py", line 1024, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 404 Client Error: Not Found for url: https://huggingface.co/HuggingFaceH4/gemma-2-2b-gkd/resolve/main/config.json

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/transformers/utils/hub.py", line 402, in cached_file
    resolved_file = hf_hub_download(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/utils/_deprecation.py", line 101, in inner_f
    return f(*args, **kwargs)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/utils/_validators.py", line 114, in _inner_fn
    return fn(*args, **kwargs)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/file_download.py", line 1240, in hf_hub_download
    return _hf_hub_download_to_cache_dir(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/file_download.py", line 1303, in _hf_hub_download_to_cache_dir
    (url_to_download, etag, commit_hash, expected_size, head_call_error) = _get_metadata_or_catch_error(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/file_download.py", line 1752, in _get_metadata_or_catch_error
    metadata = get_hf_file_metadata(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/utils/_validators.py", line 114, in _inner_fn
    return fn(*args, **kwargs)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/file_download.py", line 1674, in get_hf_file_metadata
    r = _request_wrapper(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/file_download.py", line 376, in _request_wrapper
    response = _request_wrapper(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/file_download.py", line 400, in _request_wrapper
    hf_raise_for_status(response)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/huggingface_hub/utils/_errors.py", line 315, in hf_raise_for_status
    raise EntryNotFoundError(message, response) from e
huggingface_hub.utils._errors.EntryNotFoundError: 404 Client Error. (Request ID: Root=1-66e7e09a-17e4310c5f1032c2189efc96;f483305a-4822-4bd4-a502-3a867fafecc9)

Entry Not Found for url: https://huggingface.co/HuggingFaceH4/gemma-2-2b-gkd/resolve/main/config.json.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/fsx/lewis/miniconda3/envs/mixeval/bin/vllm", line 8, in <module>
    sys.exit(main())
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/scripts.py", line 165, in main
    args.dispatch_function(args)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/scripts.py", line 37, in serve
    asyncio.run(run_server(args))
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/entrypoints/openai/api_server.py", line 462, in run_server
    async with build_async_engine_client(args) as async_engine_client:
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/contextlib.py", line 199, in __aenter__
    return await anext(self.gen)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/entrypoints/openai/api_server.py", line 108, in build_async_engine_client
    async with build_async_engine_client_from_engine_args(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/contextlib.py", line 199, in __aenter__
    return await anext(self.gen)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/entrypoints/openai/api_server.py", line 130, in build_async_engine_client_from_engine_args
    if (model_is_embedding(engine_args.model, engine_args.trust_remote_code,
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/entrypoints/openai/api_server.py", line 71, in model_is_embedding
    return ModelConfig(model=model_name,
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/config.py", line 176, in __init__
    self.hf_config = get_config(self.model, trust_remote_code, revision,
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/vllm/transformers_utils/config.py", line 66, in get_config
    config = AutoConfig.from_pretrained(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/transformers/models/auto/configuration_auto.py", line 976, in from_pretrained
    config_dict, unused_kwargs = PretrainedConfig.get_config_dict(pretrained_model_name_or_path, **kwargs)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/transformers/configuration_utils.py", line 632, in get_config_dict
    config_dict, kwargs = cls._get_config_dict(pretrained_model_name_or_path, **kwargs)
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/transformers/configuration_utils.py", line 689, in _get_config_dict
    resolved_config_file = cached_file(
  File "/fsx/lewis/miniconda3/envs/mixeval/lib/python3.10/site-packages/transformers/utils/hub.py", line 456, in cached_file
    raise EnvironmentError(
OSError: HuggingFaceH4/gemma-2-2b-gkd does not appear to have a file named config.json. Checkout 'https://huggingface.co/HuggingFaceH4/gemma-2-2b-gkd/tree/main' for available files.

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[github-actions]

👋 Hi! Thank you for contributing to the vLLM project.
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[DarkLight1337]

Thanks for the fix!