[clang] [clang][ASTImporter] support import return with UnaryTransformType (PR #101517)

[Matheus Izvekov via cfe-commits]

https://github.com/mizvekov approved this pull request.

LGTM

You can limit the amount of nodes traversed, but I don't expect this will have a significant impact.

https://github.com/llvm/llvm-project/pull/101517