…m targets

preset_cache_paths only matched targets by name + native sibling extensions
(.exe, .node, lib*.a). Emscripten emits a .js loader and .worker.mjs pthread
worker alongside every .wasm exec target as a unit, so cache_upload missed
them and a wasm-threads cache hit restored barretenberg.wasm without the
matching barretenberg.js.

bb-ts/scripts/copy_wasm.sh then unconditionally copies cpp/build-wasm-threads/
bin/barretenberg.js into dest/<flavor>/barretenberg_wasm/, which fast-mode CI
hits before any cache miss can rebuild the cpp side, producing:
  cp: cannot stat '../cpp/build-wasm-threads/bin/barretenberg.js': No such file or directory

Extend preset_cache_paths so any target ending in .wasm also picks up the
$stem.js and $stem.worker.mjs siblings from the same bin/ directory.