[llvm] [LLVM] Use multi-argument std::min and std::max. NFC. (PR #206982)

[Jakub Kuderski via llvm-commits]

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

nit: the pr title is a bit misleading, technically this is a single-argument overload... maybe call it initializer-list min/max or say something like 'Avoid nested std::min/max'?

https://github.com/llvm/llvm-project/pull/206982