[llvm] [VPlan] Use VPWidenIntrinsicRecipe to support binary and unary operations with EVL-vectorization (PR #114205)

[Luke Lau via llvm-commits]

lukel97 wrote:

Were you able to build llvm-test-suite/SPEC CPU 2017 for RISC-V with this patch? I'm aware that the VP codegen can hit some snags and isn't as well tested as the non-VP path, e.g. see #120405

https://github.com/llvm/llvm-project/pull/114205