[llvm] [VPlan] Introduce scalar loop header in plan, remove VPLiveOut. (PR #109975)

[Florian Hahn via llvm-commits]

fhahn wrote:

Just updated the patch, including
* updating all required test
* updated VPlan to hold a pointer to the (unchangeable) scalar header VPIRBasicBlock and added helpers to retrieve itself and the scalar preheader using it, addressing another TODO

ping :)

https://github.com/llvm/llvm-project/pull/109975