[llvm] [WebAssembly] Avoid scanning unrelated debug values (NFCI) (PR #218378)

[Demetrius Kanios via llvm-commits]

QuantumSegfault wrote:

This is your write-up, right? https://00f.net/2026/08/19/why-compiling-rust-to-webassembly-is-slow/

https://github.com/llvm/llvm-project/pull/218378