Fix test `test_server_stale_peer_out_of_region` (#9030)
Fix test `test_server_stale_peer_out_of_region` (#9030)

Signed-off-by: Xintao <27e2221a3590bdf1c7193b8c94a0212f0bff29a3@live.com>
pingcap/tikv,BusyJay/tikv,pingcap/tikv,BusyJay/tikv,BusyJay/tikv,BusyJay/tikv,c4pt0r/tikv