Replace materializeForSet with the modify coroutine.

Most of this patch is just removing special cases for materializeForSet
or other fairly mechanical replacements.  Unfortunately, the rest is
still a fairly big change, and not one that can be easily split apart
because of the quite reasonable reliance on metaprogramming throughout
the compiler.  And, of course, there are a bunch of test updates that
have to be sync'ed with the actual change to code-generation.

This is SR-7134.

include/swift/Serialization/ModuleFile.h

@@ -574,6 +574,7 @@ private:
 
   /// Sets the accessors for \p storage based on \p rawStorageKind.
   void configureStorage(AbstractStorageDecl *storage,
+                        uint8_t rawOpaqueReadOwnership,
                         uint8_t rawReadImpl,
                         uint8_t rawWriteImpl,
                         uint8_t rawReadWriteImpl,