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!
Since getStoredProperties() is a request that lowers lazy properties
and property wrappers to their underlying storage, and SIL can validate
stored property and enum element types, there's no longer any need for
Sema to explicitly finalize members of structs and enums. SILGen can
trigger any necessary type checkin work just by lowering a struct or
enum type.
Now the only remaining reason we need finalizeDecl() is adding implicit
methods to classes, and synthesizing accessors for storage in classes
and protocols.
