Fix CI for OTP macOS build

[KronicDeth]

[bitwalker]

I'm going to start porting over stuff piecemeal from this PR into develop, but I don't think there is any way to merge this PR without a mess, but that's fine since there is not only a considerable gap between how BIFs should be implemented now and how they were when the original BIFs were written, but a number of BIFs are implemented already, so there will necessarily be some cherry-picking anyway.

I think one of the most important things in this code is going to be the tests, but that's going to be a very manual porting process, because the entire runtime was rewritten. In any case, I'm going to prioritize this above other work (other than a few bugs I'm tracking) because I'd like to have all of these BIFs back in the fold, so to speak.