[llvm] [LangRef][IR] Add 3 way compare <=> integer intrinsics (PR #83227)

[Miguel Raz Guzmán Macedo via llvm-commits]

miguelraz wrote:

> Can you please update the PR description to be specific to just this patch (and take it out of draft mode if you think it's ready)?

Sweet, I'll get right on that.

https://github.com/llvm/llvm-project/pull/83227