[llvm] [InstCombine] Fold align assume into load's !align metadata if possible. (PR #108958)

[Florian Hahn via llvm-commits]

fhahn wrote:

(other alternative would be to just keep the assumptions, but I was hoping this patch would help to avoid introducing too many new instructions when doing something like https://github.com/llvm/llvm-project/pull/108961)

https://github.com/llvm/llvm-project/pull/108958