[type: new feature] adding integration test workflow

**Is your feature request related to a problem? (你需要的功能是否与某个问题有关?)**
It is inevitable that there are problems in the code of manual review. Adding integration test workflow can effectively solve this problem.

**Describe the solution you'd like (描述你期望的解决方法)**
Adding integration test workflow, it is recommended to reuse the code below https://github.com/apache/incubator-brpc/tree/master/example . At present, I am not familiar with C++ and brpc. I hope that the master can complete it.

**Describe alternatives you've considered (描述你想到的折衷方案)**

**Additional context/screenshots (更多上下文/截图)**

Start by reviewing the integration-test material in the repository's example directory at https://github.com/apache/incubator-brpc/tree/master/example and inspect the existing project workflow configuration. Determine how those examples can be exercised as integration tests in the workflow. Done means an integration test workflow is added and runs the intended example-based checks successfully.

Written by the indexing model from the issue text.