tests: try to stabilize test_server_auto_adjust_replica (#9271)
tests: try to stabilize test_server_auto_adjust_replica (#9271)

Signed-off-by: 5kbpers <82ce634e1749ff1c036c2970dd69219ac9501357@pingcap.com>
BusyJay/tikv,pingcap/tikv,BusyJay/tikv,c4pt0r/tikv,pingcap/tikv,BusyJay/tikv,BusyJay/tikv