[llvm] [mlir] Add llvm::min/max_element and use it in llvm/ and mlir/ directories. (PR #84678)

[Mehdi Amini via llvm-commits]

joker-eph wrote:

The bot has been migrated to GitHub, and it failed on this PR :)

![Screenshot 2024-03-10 at 9 28 21 PM](https://github.com/llvm/llvm-project/assets/3372300/d7c8bcd4-be9a-4d5c-af3a-65ed34268eac)


https://github.com/llvm/llvm-project/pull/84678