timeoutAlarm model interval bug,You can now set negative integers (#3171)

Co-authored-by: Nqiaozhanwei <qiaozhanwei@outlook.com>

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/formModel/_source/timeoutAlarm.vue

@@ -91,7 +91,8 @@
           return false
         }
         // Verify timeout duration Non 0 positive integer
-        if (this.enable && !parseInt(this.interval) && !_.isInteger(this.interval)) {
+        const reg = /^[1-9]\d*$/
+        if (this.enable && !reg.test(this.interval)) {
           this.$message.warning(`${this.$t('Timeout must be a positive integer')}`)
           return false
         }