chore(writer): call shutdown on stop

Author: VianneyRuhlmann

ddtrace/internal/writer/writer.py

@@ -1068,7 +1068,7 @@ def _stop_service(
         # FIXME: don't join() on stop(), let the caller handle this
         super(NativeWriter, self)._stop_service()
         forksafe.unregister_before_fork(self.before_fork)
-        self.before_fork()
+        self._exporter.shutdown(int(timeout or 0))
         self.join(timeout=timeout)
 
     def before_fork(self) -> None: