[llvm] Reapply "[VPlan] Compute cost of more replicating loads/stores in ::computeCost. (#160053)" (PR #162157)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

@fhahn Looks like it still crashes in some cases https://godbolt.org/z/jvnE5vqa1

https://github.com/llvm/llvm-project/pull/162157