Resync web-platform-tests/webaudio from upstream.
Created attachment 451392 [details] Patch
Created attachment 451420 [details] Patch
Created attachment 451469 [details] Patch
Committed r289539 (247070@main): <https://commits.webkit.org/247070@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 451469 [details].
<rdar://problem/88757720>