Metal example #2133

Job	Run time
Lint macOS 64bit	6m 38s
Lint iOS 32bit	1m 25s
Lint GNUStep + exceptions	2m 25s
Lint header-translator	46s
Lint test-assembly	43s
Check formatting	29s
Check MSRV	1m 45s
Test macOS 12	9m 42s
Verify header translator output	51s
Assembly tests	1m 6s
Test Compiler-RT	24s
Check icrate features	0s
Test GNUStep with libobjc2 v1.9	3m 41s
Test GNUStep with libobjc2 v2.0	2m 56s
Test GNUStep with libobjc2 v2.1 on nightly	3m 9s
Test GNUStep 32bit	2m 55s
Compiler UI	1m 24s
${{ matrix.name }}	0s
Test on iOS simulator w. dinghy	0s
	40m 19s

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