[Bug]: oracle for device checking raise exception unexpectly

[Selkh]

Your current environment

v0.8.1

🐛 Describe the bug

Oracle check does no work as expected. Suggested to revert.

The support for v1 should be determined by the pluggable platform, not the current status of in-tree project. This type of forced error seems problematic and redundant with "cuda check" at the last of function. (#15104)

# https://github.com/vllm-project/vllm/blob/main/vllm/engine/arg_utils.py#L1601
if not (current_platform.is_cuda_alike() or current_platform.is_tpu()):
    _raise_or_fallback(
        feature_name=f"device type={current_platform.device_type}",
        recommend_to_remove=False)
    return False

It will forcely raise for any other platform, even V1 supported. Further, redundant with https://github.com/vllm-project/vllm/blob/main/vllm/engine/arg_utils.py#L1626

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[DarkLight1337]

cc @ywang96 @youkaichao

[youkaichao]

@DarkLight1337 we can add supports_v1 as an attribute for the platform interface.

[Selkh]

@youkaichao Thank you for your response and it will certainly be fine.
By the way, another issue (#15176) has no response, please also check if the feedback is reasonable.

[DarkLight1337]

@DarkLight1337 we can add supports_v1 as an attribute for the platform interface.

Sounds good, do you have time to open a PR?