[llvm] [WebAssembly] Implement lowering calls through funcref to call_ref when available (PR #162227)

[Derek Schuff via llvm-commits]

dschuff wrote:

That would be great. I think I just missed it before. Maybe test/MC/WebAssembly/reference-types.s would be a good place.

https://github.com/llvm/llvm-project/pull/162227