Response's aclose/close function should NOT set status so earlier.

[yuedai]

https://github.com/encode/httpx/blob/89102021fcb44f6c3fab6304e5f951692723c908/httpx/_models.py#L1065C1-L1077C1

In the close/aclose function of Response, current implementation do this:

        if not self.is_closed:
            self.is_closed = True
            with request_context(request=self._request):
                await self.stream.aclose()

I am wondering if self.stream.aclose() failed for the first time, we would have a half state connection and would never be closed?

Should we change it to

    async def aclose(self) -> None:
        """
        Close the response and release the connection.
        Automatically called if the response body is read to completion.
        """
        if not isinstance(self.stream, AsyncByteStream):
            raise RuntimeError("Attempted to call an async close on an sync stream.")

        if not self.is_closed:
            with request_context(request=self._request):
                await self.stream.aclose()
                self.is_closed = True