[llvm] [RISCV] Emit VP strided loads/stores in RISCVGatherScatterLowering (PR #98111)

[Philip Reames via llvm-commits]

preames wrote:

I actively oppose backporting this.  Backporting has a risk, and there's no obvious benefit to outweigh that.  

https://github.com/llvm/llvm-project/pull/98111