Improve type registration order in register_core_types.cpp.

[Ivorforce]

• Prepares for Warn when classes are registered out of order #106873

In our main setup, types are being registered out of order. This denies us from making confident caches, because the parent may not be fully registered by the time the child is registered.

This PR is a first, small step towards making them ordered. This prepares for the eventual merge of #106873, by reducing the number of warnings it would raise.

Since there will be a handful of PRs like this, I'll try to keep them thematically consistent, to make review easier.

[dsnopek]

Thanks! These changes look good to me. I'm actually surprised at how minimal the changes are for the core types - I had thought the situation was much worse :-)

[Ivorforce]

I had thought the situation was much worse :-)

There are a bunch more, but most of the rest isn't as straight forward. I'm just taking it slow 😅

[Repiteo]

Thanks!