[llvm] [VPlan] Remove VPBlendRecipe and replace with select VPInstructions (PR #150369)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

Hm, this seems like an excellent simplification, and the cons are very unclear to me.

https://github.com/llvm/llvm-project/pull/150369