[clang] [clang] `this` getter missed in ConstructAttributeList (PR #203010)

[Eli Friedman via cfe-commits]

https://github.com/efriedma-quic approved this pull request.

I don't think you're describing the failure mode correctly. (`castAs<PointerType>` ignores qualifiers).

Otherwise LGTM

https://github.com/llvm/llvm-project/pull/203010