Add CI run on specific apache/dolphinscheduler pr instead of dev one

Sometimes we may create a PR base on apache/dolphinscheduler change, but DolphinScheduler-sdk-python only can run on dev head ref commit, we should find out a way to run on specific apache/dolphinscheduler pr to make our CI more smooth. I have a POC in https://github.com/apache/dolphinscheduler-sdk-python/pull/9/commits/93e7de420c57e518860cb06b2caa749b5af3d5f2, it work but not pretty.

If we can change the PR number from a comment or a commit message instead of directly change CI constants will be prefect

从 issue 中链接的 POC 提交开始，检查 CI 常量当前如何选择 apache/dolphinscheduler 的修订版本。定义如何通过评论或提交消息提供特定的 upstream PR 编号，然后验证 CI 是否针对该修订版本运行，而不直接更改常量。

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