[llvm] [WebAssembly,llvm] Add llvm.wasm.ref.test.func intrinsic, option 2 (PR #147486)

[Hood Chatham via llvm-commits]

hoodmane wrote:

Okay I think I've resolved all outstanding comments. Thanks @arsenm and @RKSimon.
cc @sbc100 @tlively @dschuff

https://github.com/llvm/llvm-project/pull/147486