[llvm] [VPlan] Implement interleaving as VPlan-to-VPlan transform. (PR #95842)

[Florian Hahn via llvm-commits]

fhahn wrote:

@dyung this should be fixed by https://github.com/llvm/llvm-project/commit/53266f73f037bd20bcbbd7852fd0c6a7703b4c38., which runs additional cleanup of recipes after unrolling.

https://github.com/llvm/llvm-project/pull/95842