One can still in resilient frameworks have noncopyable frozen types.
This means that one cannot make a noncopyable:
1. Full resilient public type.
2. @usableFromInline type.
NOTE: One can still use a frozen noncopyable type as a usableFromInline class
field. I validated in the attached tests that we get the correct code
generation.
I also eliminated a small bug in TypeCheckDeclPrimary where we weren't using a
requestified attr check and instead were checking directly.
rdar://111125845
We can probably avoid this copy in more circumstances, but make the change only for
noncopyable types for now, since that's the case where it's most semantically apparent.
rdar://109161396
the main things still left behind the experimental flag(s) are
- move-only classes (guarded by MoveOnlyClasses feature)
- noimplicitcopy
- the _borrow operator
