[Feature]: AsyncOmni Support abort request

[ZeldaHuang]

🚀 The feature, motivation and pitch

Now AsyncOmni pass the abort function.

    async def abort(self, request_id: str | Iterable[str]) -> None:
        pass

Alternatives

No response

Additional context

No response

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[hsliuustc0106]

are you going to contribute to this feature?

[ZeldaHuang]

@hsliuustc0106 Yes, I'm working on it.

[hsliuustc0106]

@hsliuustc0106 Yes, I'm working on it.

assigned

[hsliuustc0106]

#486 merged