[llvm] [RISCV][CostModel] VPIntrinsics have same cost as their non-vp counterparts (PR #67178)

[Kunwar Grover via llvm-commits]

Groverkss wrote:

> > may I push a revert? We can try to generate a better repro asynchronously.
> 
> Sure thing. Can you please show me how I can reproduce this upstream?

bug.ll : https://gist.github.com/Groverkss/4893d082222ea96dd6ac238cf8697cbd
`opt -O3 bug.ll`

This reproduces the bug for me

https://github.com/llvm/llvm-project/pull/67178