[clang] [llvm] [WebAssembly] Implement prototype f16x8.splat instruction. (PR #93228)

[Brendan Dahl via llvm-commits]

brendandahl wrote:

> LGTM % `!HasHalfPrecision` thing
> 
> By the way I guess you can try getting commit access soon? I think it is still "Send an email to Chris" though...

Done, can I get a squash and merge?

I'll look into getting commit access.

https://github.com/llvm/llvm-project/pull/93228