[llvm] [WebAssembly] Don't return multivalue when Emscripten EH/SjLj is used (PR #86048)

[Thomas Lively via llvm-commits]

tlively wrote:

> the JS invoke wrappers cannot return multivalue because JS doesn't support that

Doesn't it? I thought multivalue interacts with JS by having multivalue function called from JS return JS arrays of values.

https://github.com/llvm/llvm-project/pull/86048