[test] AudioWorklet tests now correctly run and exit

[cwoffenden]

All the audio tests in test_browser.py (except the mixer) were updated now the CI has audio, specifically:

• Tests that require audio were flagged as so (tests that don't are documented)
• Tests that currently fail for 2GB and wasm64 were flagged (only tests that play audio fail)
• All tests were migrated to btest_exit() as previously discussed
• (Tests moved printf calls to Emscripten's API and not stdio)
• All tests were run manually and the audio output verified
• All tests were run with emscripten_force_exit returning non-zero to verify they failed
• All of this was also verified that they're running on a Debian VM without audio to manually check the console for "Test success" and other outputs for tests without requires_sound_hardware

The mixer/AW struct test is a standalone PR in #23659.

Fixes: #23131

[cwoffenden]

@sbc100 Would you prefer all of the AW tests working/enabled in batches like this, or all as one?

[sbc100]

@sbc100 Would you prefer all of the AW tests working/enabled in batches like this, or all as one?

How many AW tests are there? If all of the tests are to be changes like this in the same manor I think doing it all at once seems reasonable.

[sbc100]

If you are asking about landing the fixes at the same time as the test updates, I think those are good to keep separate. I

I like this this change simply updates test code, for example.

[cwoffenden]

Mostly just the small collection of AW tests in the same section of code, and they should follow the same pattern. I’ll combine them together.

I’ll keep the test with the audio files and mixer part of the separate current PR (because it’s larger).

And again separately I’ll add this to the browser tests but disabled, since it’s broken:

https://github.com/emscripten-core/emscripten/blob/main/test/webaudio/audioworklet_emscripten_futex_wake.cpp

And any fixes, e.g. wasm64 and 2gb in their own PRs.

[sbc100]

Is this change ready to land now?

[cwoffenden]

Is this change ready to land now?

Yes, this change is all done (as is the mixer PR).