[clang] [clang][ObjectiveC] Fix Parsing Types with the `::` Optional Scope Specifier (PR #119908)

[Qiongsi Wu via cfe-commits]

qiongsiwu wrote:

The Objective-C test is modified to contain valid code with `::` to include @vsapsai 's suggestion . https://github.com/llvm/llvm-project/pull/119908/files#diff-0c0e8844905a75c581903811a694e614f49b2945e2254a76bb5a215443028554R11

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