[batch] Use the end-time in the UI atttempt-ordering if start_time is null (#12330)
[batch] Use the end-time in the UI atttempt-ordering if start_time is null (#12330)


hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail