[enhance](mtmv)When drop MTMV, no longer wait for task cancel to complete (#45995)#46025

Jibing-Li merged 1 commit intoapache:branch-2.1apache/doris:branch-2.1from

zddr:mv_cancle_not_wait_2.1zddr/incubator-doris:mv_cancle_not_wait_2.1Copy head branch name to clipboard