Add the AVFAudio framework #3193

Job	Run time
Check formatting	8s
Lint macOS x86_64	2m 56s
Check MSRV	57s
Lint iOS ARMv7s	2m 51s
Lint visionOS Aarch64 simulator	3m 2s
Lint GNUStep + exceptions	1m 23s
Lint header-translator	34s
Lint test-assembly	45s
Test macOS 15 Aarch64	1m 27s
Assembly tests	50s
Check framework features	0s
Verify header translator output	1m 38s
Test GNUStep with libobjc2 v1.9	1m 25s
Compiler UI	43s
Test Compiler-RT	21s
Test GNUStep with libobjc2 v2.0	1m 12s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Test GNUStep with libobjc2 v2.1 on nightly	53s
Test on iOS simulator w. dinghy	0s
Test GNUStep 32bit	1m 28s
	22m 33s

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