[llvm] [VPlan] Manage noalias/alias_scope metadata in VPlan. (NFC) (PR #136450)

[via llvm-commits]

ayalz wrote:

Could the no-alias metadata added by loop versioning be managed by a dedicated VPlan-to-VPlan pass, continuing to capture only metadata that propagates from underlying instructions during initial VPlan/recipe construction? May require introducing API to update recipe metadata, but hopefully simple as it merely augments additional nodes?

https://github.com/llvm/llvm-project/pull/136450