[clang] [Sema] add cast from IncompleteArrayType to ConstantArrayType in TryReferenceListInitialization (PR #65918)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

I guess this ends up producing a CK_NoOp CastExpr?  That's probably okay, but can we amend the documentation for CK_NoOp to give this as an example?

https://github.com/llvm/llvm-project/pull/65918