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

[Demetrius Kanios via llvm-commits]

QuantumSegfault wrote:

That makes more sense: #139642 is the one that actually added the instruction and the corresponding tests.

But there, AsmParser support (which I realized was missing after seeing these tests) and tests for the three new instructions.

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