fix: ddl without drop exists (#14128)

Co-authored-by: Rick Cheng <rickchengx@gmail.com>
(cherry picked from commit d8e820c4b9)

dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_mysql.sql

@@ -2092,6 +2092,10 @@ CREATE TABLE `t_ds_fav_task`
   AUTO_INCREMENT = 1
   DEFAULT CHARSET = utf8 COLLATE = utf8_bin;
 
+-- ----------------------------
+-- Table structure for t_ds_trigger_relation
+-- ----------------------------
+DROP TABLE IF EXISTS `t_ds_trigger_relation`;
 CREATE TABLE `t_ds_trigger_relation` (
     `id` bigint(20) NOT NULL AUTO_INCREMENT,
     `trigger_type` int(11) NOT NULL DEFAULT '0' COMMENT '0 process 1 task',