[llvm] VPlan/Builder: refine return types (NFC) (PR #108858)

[David Sherwood via llvm-commits]

david-arm wrote:

One problem I see with this patch is that it forbids any kind of optimisation such as constant folding, which may want to return a result that isn't a VPInstruction.

https://github.com/llvm/llvm-project/pull/108858