Potentially maintain our Ruby patches in a separate repository

[ronaldtse]

Makes it clear and clean on what is being patched.

Allows easier adding of new rubies and for contributions.

Tebako can build using a manifest of the Rubies or just download that manifest on-demand.

[maxirmx]

We do not have Ruby patches.
We have scripts that patch Ruby "on the fly". This approach has significant advantages over separate repositories because it eliminates teh need to maintain forks.
If you look at brew/Portable Ruby/vcpkg they do the same - patch on the fly without separate repositories.