[clang] [WebAssembly] Change the default linker for `wasm32-wasip2` (PR #84569)

[Alex Crichton via cfe-commits]

alexcrichton wrote:

At @sunfishcode's request I've pushed up a second commit which pass the path to `wasm-ld` to `wasm-component-ld`, and in testing it I also added the ability for `-fuse-ld=lld` to explicitly request that `wasm-ld` is used, regardless of target.

https://github.com/llvm/llvm-project/pull/84569