[llvm] [LV] Fix assertion in convertToStridedAccesses for wide pointer strides (PR #200364)

[Mel Chen via llvm-commits]

Mel-Chen wrote:

> @Mel-Chen I think I would be good to add the crashing tests from here to #199647 as well, as long as @Michael-Chen-NJU is happy with that

@Michael-Chen-NJU Could you please add the crashing tests from this PR as a separate pre-commit PR, so they can be included in #199647?

https://github.com/llvm/llvm-project/pull/200364