[clang] [CIR] max-across-vector (vmaxv_*) intrinsics (PR #194401)

[Andrzej Warzyński via cfe-commits]

banach-space wrote:

> ping

I've posted some comments, but that really boils down to addressing my review [here](https://github.com/llvm/llvm-project/pull/194401#issuecomment-4341958810). Please address the existing comments before the next "ping".

Thank you for working on this 🙏🏻 

https://github.com/llvm/llvm-project/pull/194401