[v2] Fix flaky download test (aws#10234)

Author: hssyoo

awscli/s3transfer/download.py

@@ -551,8 +551,7 @@ def _finalize_download(self, pre_finalize_callbacks, finalize_callback):
                 callback()
             except Exception as e:
                 self._transfer_coordinator.set_exception(e)
-                self._transfer_coordinator.announce_done()
-                return
+                break
         finalize_callback()
 
     def _get_final_io_task_submission_callback(