[clang] [Clang][AllocToken] Support TypeFuncHash and TypeFuncHashPointerSplit modes (PR #228492)

[Ai Nozaki via cfe-commits]

ainozaki wrote:

Hi @vitalybuka, could you take a look when you have a chance? This is the Clang side of #227686, which added AllocToken modes `TypeFuncHash`/`TypeFuncHashPointerSplit` that hash both the allocated type and the containing function's name. Thank you in advance.

https://github.com/llvm/llvm-project/pull/228492