... so we can avoid requiring users to have python3 and install pyyaml to run make verify

I think this would actually be relatively straightforward, but I wanted to get feedback first.

Also while the script is in kubernetes/kubernetes, I figured this issue tracker might have better visibility.

https://github.com/kubernetes/kubernetes/blob/master/hack/verify-publishing-bot.py

Thoughts @nikhita @cpanato @dims?