Add stream=True for file.download and media.download

[ealyn]

User need

We must saving memory while download large file.

Requested feature

stream – (optional) if False, the response content will be immediately downloaded.
https://requests.readthedocs.io/en/latest/api/

Modify method Transport.execute to use requests stream argument.

oapi-sdk-python/lark_oapi/core/http/transport.py

Line 16 in 9b1a69f

def execute(conf: Config, req: BaseRequest, option: Optional[RequestOption] = None) -> RawResponse:

Maybe you can add stream into RequestOption, and stream_content into RawResponse.