Revert "wait top stop background tasks before stop writer stream"

This reverts commit ecc8cbc.

Author: rekby

ydb/_topic_writer/topic_writer_asyncio.py

@@ -366,7 +366,8 @@ async def _connection_loop(self):
 
                 tasks = [send_loop, receive_loop]
                 done, _ = await asyncio.wait([send_loop, receive_loop], return_when=asyncio.FIRST_COMPLETED)
-                done.pop().result()  # need for raise exception - reason of stop task
+                await stream_writer.close()
+                done.pop().result()
             except issues.Error as err:
                 err_info = check_retriable_error(err, retry_settings, attempt)
                 if not err_info.is_retriable:
@@ -379,12 +380,12 @@ async def _connection_loop(self):
                 self._stop(err)
                 return
             finally:
+                if stream_writer:
+                    await stream_writer.close()
                 for task in tasks:
                     task.cancel()
                 if tasks:
                     await asyncio.wait(tasks)
-                if stream_writer:
-                    await stream_writer.close()
 
     async def _encode_loop(self):
         try: