[clang] [WebAssembly] Disable running `wasm-opt` on components (PR #98373)

[Quentin Michaud via cfe-commits]

mh4ck-Thales wrote:

A shell script would work. I don't know how easy it is to create a shell script inside the test suite and use it though, and it would be nice if this fake wasm-opt script could be unique across several tests, to ensure the consistency of those.

https://github.com/llvm/llvm-project/pull/98373