This ensures that these quoted likely forwards references in
return type annotations behave like their non-quoted equivalents.
I suspect there may be other places which will need similar
adjustments, which may mean that we should push the conversion
a layer closer to the parsing (perhaps in `py__annotations__`?).
One case I know that this doesn't solve (but which likely needs
similar adjustment) is generics in return types of comment-style
annotations. They're less likely and may not be worth supporting
since all supported Python versions can use the in-syntax spelling
for annotations at this point.
599a1c3ee1