fix(接口测试): 修复场景执行单步骤时提示csv不存在的缺陷

--bug=1025964 --user=王孝刚 【接口测试】新建场景-添加csv场景变量-单步骤调试失败引用csv文件失败
https://www.tapd.cn/55049933/s/1368421
--bug=1025973 --user=王孝刚
【接口测试】api-点击测试-调试失败 https://www.tapd.cn/55049933/s/1368420

frontend/src/business/components/api/automation/scenario/EditApiScenario.vue

@@ -1135,8 +1135,7 @@ export default {
     setVariables(v, headers) {
       this.currentScenario.variables = v;
       this.currentScenario.headers = headers;
-      if (this.path.endsWith("/update")) {
-        // 直接更新场景防止编辑内容丢失
+      if (v && v.length> 0 || headers && headers.length > 0) {
         this.editScenario();
       }
       if (this.$refs.maximizeHeader) {

frontend/src/business/components/api/definition/components/EditCompleteContainer.vue

@@ -228,6 +228,12 @@ export default {
       }
       if (this.currentApi.request) {
         this.currentApi.request.clazzName = TYPE_TO_C.get(this.currentApi.request.type);
+        if (this.currentApi.request.hashTree) {
+          let hasNull = this.currentApi.request.hashTree.filter(v => !v || v == null);
+          if (hasNull && hasNull.length > 0) {
+            this.currentApi.request.hashTree = [];
+          }
+        }
         this.sort(this.currentApi.request.hashTree);
       }
     },