executor: fix processlist's Mem is not zero when HashJoin finished (#34569)
executor: fix processlist's Mem is not zero when HashJoin finished (#34569)

close pingcap/tidb#34571
c4pt0r/tidb,c4pt0r/tidb,c4pt0r/tidb,kyle-wang/tidb,ngaut/tidb,kyle-wang/tidb,pingcap/tidb,pingcap/tidb,kyle-wang/tidb,pingcap/tidb,c4pt0r/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,c4pt0r/tidb,ngaut/tidb,kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,c4pt0r/tidb,kyle-wang/tidb