fix(系统设置): 插件管理中上传jar包再次上传时带了之前上传的jar包

--bug=1008289 --user=王孝刚 【系统设置】插件管理，上传jar包再次上传，带了之前上传的jar包
https://www.tapd.cn/55049933/s/1073485

frontend/src/business/components/settings/plugin/JarConfig.vue

@@ -114,6 +114,7 @@ export default {
             this.result = this.$fileUpload(url, this.fileList[0], null, null, () => {
               this.$success(this.$t('organization.integration.successful_operation'));
               this.$emit("close");
+              this.fileList = [];
             });
           } else {
             return false;