[llvm] [Exegesis][RISCV] Add RISCV support for llvm-exegesis (PR #89047)

[Pengcheng Wang via llvm-commits]

https://github.com/wangpc-pp commented:

You need to add some `REQUIRES` to tests. @dybv-sc 

https://github.com/llvm/llvm-project/pull/89047