Fix GrpcWrapperAsyncIO.close for OpenTelemetry intercepted streams (#684)

When OpenTelemetry intercepts grpc stream calls it returns generator. So in `GrpcWrapperAsyncIO.close` in case of intercepted call `self._stream_call` have no method `cancel` but have method `close`.

Author: r7sa

ydb/_grpc/grpcwrapper/common_utils.py

@@ -198,7 +198,12 @@ async def start(self, driver: SupportedDriverType, stub: Any, method: str) -> No
     def close(self) -> None:
         self.from_client_grpc.put_nowait(_stop_grpc_connection_marker)
         if self._stream_call:
-            self._stream_call.cancel()
+            if hasattr(self._stream_call, "cancel"):
+                # for ordinal grpc calls
+                self._stream_call.cancel()
+            elif hasattr(self._stream_call, "close"):
+                # for OpenTelemetry intercepted grpc calls (generator)
+                self._stream_call.close()
 
         self._clean_executor(wait=True)