[llvm] [VPlan] Implement cloning of VPlans. (PR #73158)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Comments should be addressed, thanks! Also rebased on top of current `main` after landing VPlan-based truncateToMinimalBitwidthss

https://github.com/llvm/llvm-project/pull/73158