[llvm] [LoopVectorize] Add support for reverse loops in isDereferenceableAndAlignedInLoop (PR #96752)

[David Sherwood via llvm-commits]

david-arm wrote:

Looks like this is causing an assert failure for build https://lab.llvm.org/buildbot/#/builders/169/builds/7413. I'll revert asap.

https://github.com/llvm/llvm-project/pull/96752