fix(接口测试): 修复跳转的未显示自定义字段的缺陷

--bug=1026130 --user=王孝刚 【接口测试】github#24358，场景中点击复制的 api
跳转到接口定义页面，自定义字段不显示 https://www.tapd.cn/55049933/s/1371193

api-test/backend/src/main/java/io/metersphere/service/definition/ApiDefinitionService.java

@@ -1712,6 +1712,7 @@ public class ApiDefinitionService {
         ApiDefinitionRequest request = new ApiDefinitionRequest();
         request.setId(id);
         List<ApiDefinitionResult> list = extApiDefinitionMapper.list(request);
+        buildCustomField(list);
         ApiDefinitionResult result = null;
         if (CollectionUtils.isNotEmpty(list)) {
             result = list.get(0);