[llvm] [LangRef] Do not make align imply dereferenceability (PR #158062)

[Florian Hahn via llvm-commits]

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

This makes sense to me and makes things clearer w.r.t. to certain extensions for security (e.g. AArch64's MTE limits the size of memoyr that can be accessed speculatively to 16 byte granulas)

Best to let this sit for a few days, to give others a chance to chime in

https://github.com/llvm/llvm-project/pull/158062