Kavon Farvardin a4e9919f29 [Sema] require value deinit absence for Copyable ...

A value type like a struct or enum cannot conform to Copyable if it has
a deinit. When NoncopyableGenerics is enabled, we make that part of what
 is required to verify that such a nominal type conforms to Copyable.

This change also does some refactoring to share common code to point out
 how to make a type noncopyable.

2023-11-06 19:44:58 -08:00

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