[clang] [llvm] [WebAssembly] support getVT from `externref` and `funcref` (PR #97080)

[Congcong Cai via cfe-commits]

HerrCai0907 wrote:

> What happens if you compile a file that really vectorizes reference types? The attached test doesn't seem to actually end up getting vectorized after all. Can you add a test that get vectorized?

Is it possible to vectorize external reference types? I don't think there are valid test case for it.

https://github.com/llvm/llvm-project/pull/97080