fix(接口定义): 修复场景变量批量添加未覆盖的缺陷

--bug=1016048 --user=王孝刚 【接口测试】批量添加场景变量，同名变量没覆盖
https://www.tapd.cn/55049933/s/1228204

frontend/src/business/components/api/automation/scenario/variable/VariableList.vue

@@ -352,10 +352,20 @@ export default {
     batchSaveParameter(data) {
       if (data) {
         let keyValues = this._handleBatchVars(data);
-        keyValues.forEach(item => {
-          item.type = 'CONSTANT';
-          this.addParameters(item);
+        keyValues.forEach(keyValue => {
+          let isAdd = true;
+          keyValue.id = getUUID();
+          this.variables.forEach(item => {
+            if (item.name === keyValue.name) {
+              item.value = keyValue.value;
+              isAdd = false;
+            }
+          })
+          if (isAdd) {
+            this.variables.splice(this.variables.length, 0, keyValue);
+          }
         });
+        this.sortParameters();
       }
     },
     handleClick(command) {
@@ -462,13 +472,11 @@ export default {
         return;
       }
       let repeatKey = "";
-      if (!this.showDelete) {
-        this.variables.forEach((item, index) => {
+      this.variables.forEach((item) => {
         if (item.name === this.editData.name) {
           repeatKey = item.name;
         }
       });
-      }
       if (repeatKey !== "") {
         this.$warning(this.$t('api_test.scenario.variables') + "【" + repeatKey + "】" + this.$t('load_test.param_is_duplicate'));
         return;