[clang] [clang-tools-extra] [Clang] Add builtin that sorts types (PR #152118)

[Ilya Biryukov via cfe-commits]

ilya-biryukov wrote:

I will rebase this and move out of draft state after #106730 lands. Currently the change also includes commit from that PR.
Also left to do: add a builtin to compare types by mangled names.

https://github.com/llvm/llvm-project/pull/152118