[clang] [llvm] [RISCV] Add Zvzip intrinsics (PR #186342)

[Brandon Wu via cfe-commits]

4vtomat wrote:

I think we missed the test for bfloat on both c and llvm, that's probably because `rvv-intrinsic-doc` handles bfloat separately lol

https://github.com/llvm/llvm-project/pull/186342