[clang] [clang][ObjectiveC] Fix Parsing Method Parameter Types with the `::` Prefix (PR #119908)

[Volodymyr Sapsai via cfe-commits]

vsapsai wrote:

How does it work in Objective-C++? I don't know even if we have a test but hope we do.

https://github.com/llvm/llvm-project/pull/119908