Int16 mode for `toAVAudioPCMBuffer` #562

Job	Run time
run (macos-13, 14.2, iOS Simulator,OS=17.2,name=iPhone 14 Pro)	18m 16s
run (macos-13, 14.2, macOS)	5m 2s
run (macos-13, 14.2, macOS,variant=Mac Catalyst)	4m 32s
run (macos-14, 15.4, iOS Simulator,OS=17.5,name=iPhone 15 Pro)	13m 28s
run (macos-14, 15.4, macOS)	5m 37s
run (macos-14, 15.4, macOS,variant=Mac Catalyst)	5m 44s
run (macos-14, 15.4, visionOS Simulator,name=Apple Vision Pro)	10m 11s
run (macos-14, 15.4, tvOS Simulator,name=Apple TV)	9m 4s
run (macos-14, 16, iOS Simulator,OS=18.0,name=iPhone 15 Pro)	18m 27s
run (macos-14, 16, macOS)	6m 56s
run (macos-14, 16, macOS,variant=Mac Catalyst)	6m 48s
	1h 44m 5s

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