PSA: Emscripten will no longer generate separate ww.js/aw.js files with WASM_WORKERS/AUDIO_WORKLET

[Sam Clegg]

Just like we did earlier for pthread's worker.js we have now eliminated the separate `ww.js` and `aw.js` files associated with WASM_WORKERS and AUDIO_WORKLET.  See PRs #24163 and #24190.

These changes will be part of the emscripten 4.0.8 release which should happen later today.

cheers,

sam