executor: parallel cancel mpp query (#36161)
executor: parallel cancel mpp query (#36161)

ref pingcap/tiflash#5095, close pingcap/tidb#36164
pingcap/tidb,ngaut/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,ngaut/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb