validate commits to deps/v8

We have a few rules about commits to our V8 copy, that are documented in the maintaining V8 guide.
Some things could be easy to check:

• For backports / cherry-picks
  • Format of the commit title
  • Presence / correctness of the original commit message in the message
  • Presence of the Refs: github_url in the message
  • Has the embedder string been incremented?
• For regular (minor or major) updates
  • Format of the commit title

Those are just a few ideas. Let me know if it makes sense to implement them here.

首先阅读 doc/guides/maintaining-V8.md，并确定 node-core-utils 中现有的提交验证入口。明确哪些 backport 和常规更新检查属于范围，然后验证每条选定规则都会报告无效提交并接受有效提交。