[Fix-4921][UI] Fix download log get return 404 (#4922)

* fix download log 404

* remove hard code and fix same download problem in downloadFile
Co-authored-by: N李巨丰 <lijf@2345.com>

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

@@ -168,7 +168,7 @@
        * Download log
        */
       _downloadLog () {
-        downloadFile('/log/download-log', {
+        downloadFile('log/download-log', {
           taskInstanceId: this.stateId || this.logId
         })
       },

dolphinscheduler-ui/src/js/conf/home/pages/resource/pages/file/pages/details/index.vue

@@ -87,7 +87,7 @@
         this.$router.go(-1)
       },
       _downloadFile () {
-        downloadFile('/resources/download', {
+        downloadFile('resources/download', {
           id: this.$route.params.id
         })
       },