It's likely that these were listed as "REQUIRES: OS=macosx" to not
redundantly run them for iOS et al, but they don't take that long and
so it's more useful for Linux devs to be able to run them locally if
need be. Or to catch something that really is different on non-macOS.
Now that SILGen and IRGen can trigger type checking work, we have to run the
full pipeline to get a complete picture.
Thankfully everything still passes!
