[llvm] [llvm] Support building with c++23 (PR #154372)

[Nikita Popov via llvm-commits]

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

LGTM with the unrelated get() changes dropped.

I can't say I like this, but I guess we don't really have a choice :(

https://github.com/llvm/llvm-project/pull/154372