Allow &'static AnyClass in function return #3132

Job	Run time
Check MSRV	49s
Check formatting	12s
Lint macOS x86_64	2m 25s
Lint iOS ARMv7s	2m 19s
Lint visionOS Aarch64 simulator	2m 23s
Lint GNUStep + exceptions	1m 18s
Lint header-translator	26s
Lint test-assembly	22s
Test macOS 15 Aarch64	1m 34s
Assembly tests	50s
Verify header translator output	48s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Check framework features	0s
Test Compiler-RT	26s
Test GNUStep with libobjc2 v1.9	50s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.0	56s
Compiler UI	42s
Test GNUStep with libobjc2 v2.1 on nightly	42s
Test GNUStep 32bit	1m 16s
	18m 18s

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