branch-3.0: [enhance](mtmv)When drop MTMV, no longer wait for task cancel to complete #45995#46014

Jibing-Li merged 1 commit intobranch-3.0apache/doris:branch-3.0from

auto-pick-45995-branch-3.0apache/doris:auto-pick-45995-branch-3.0Copy head branch name to clipboard