[llvm] [RISCV] Fix the cost of `llvm.vector.reduce.and` (PR #119160)

[Luke Lau via llvm-commits]

https://github.com/lukel97 commented:

Thanks, would you be able to precommit the tests that were added in this PR just so we can see the diff? Feel free to push force to this branch

https://github.com/llvm/llvm-project/pull/119160