[llvm] [VPlan] Use VPTypeAnalysis to get the step type of widen pointer induction (PR #147925)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Hmm, wondering what the longer-term plan for `lv-strided-pointer-ivs` should be and if anybody is using it?

https://github.com/llvm/llvm-project/pull/147925