Update base field definitions that use the old default value callback

Somehow not quite working yet.

Ok, I think it did work, but somehow I have some weird caching issues on my site. But I did simplify it to use not the trait but the actual class name and using bas field override entity query directly.

Could possibly do it in a single loop for both, but was too lazy for that :)

Yeah, I was too lazy for that, looks good.