Adjust upload_document() to consume also a stream input

[evelyn9191]

In addition of uploading the document from a file (the case of local file system), it may be beneficial to have also a stream input (in our case of remote file system). More precisely, in this function:

    def upload_document(
        self, id_: int, file: str, filename_overwrite: str = "", values: Dict[str, str] = None
    ) -> dict:
        filename = PurePath(filename_overwrite).name or PurePath(file).name
        files: RequestsFiles = {"content": (filename, open(f"{file}", "rb"))}
        if values is not None:
            files["values"] = (None, json.dumps(values))
        return get_json(self.post(f"queues/{id_}/upload", files=files))

it would be great to feed also ByteIO stream, not only file.