[llvm] [RISCV][PoC] Schedule RVV instructions with same type first (PR #95924)

[Pengcheng Wang via llvm-commits]

wangpc-pp wrote:

@BeMg Hi Piyou, I don't have much time to make this PR further, if you have interests and time on this, you can continue the work you have done before, thanks! :-)

https://github.com/llvm/llvm-project/pull/95924