Make Queue sendable #3257

Job	Run time
Lint macOS x86_64	3m 18s
Lint iOS ARMv7s	3m 16s
Check formatting	14s
Lint visionOS Aarch64 simulator	3m 14s
Check MSRV	21s
Lint GNUStep + exceptions	1m 36s
Lint header-translator	32s
Lint test-assembly	33s
Test macOS 15 Aarch64	1m 33s
Verify header translator output	1m 49s
Assembly tests	50s
Check framework features	0s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Test Compiler-RT	32s
Test GNUStep with libobjc2 v1.9	1m 33s
Compiler UI	46s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.0	1m 13s
Test GNUStep with libobjc2 v2.1 on nightly	53s
Test GNUStep 32bit	1m 12s
	23m 25s

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