Make Queue sendable #3226

Job	Run time
Check MSRV	54s
Check formatting	19s
Lint macOS x86_64	3m 16s
Lint iOS ARMv7s	3m 8s
Lint visionOS Aarch64 simulator	3m 9s
Lint GNUStep + exceptions	1m 25s
Lint header-translator	31s
Lint test-assembly	28s
Test macOS 15 Aarch64	20s
Assembly tests	48s
Check framework features	0s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Test Compiler-RT	46s
Verify header translator output	2m 3s
Test GNUStep with libobjc2 v1.9	57s
Compiler UI	42s
Test GNUStep with libobjc2 v2.0	1m 3s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.1 on nightly	52s
Test GNUStep 32bit	1m 16s
	21m 57s

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