Remove unsafe from some vision framework functions #3157

Job	Run time
Check formatting	11s
Check MSRV	47s
Lint macOS x86_64	2m 27s
Lint iOS ARMv7s	2m 31s
Lint visionOS Aarch64 simulator	2m 28s
Lint GNUStep + exceptions	1m 23s
Lint header-translator	29s
Lint test-assembly	29s
Test macOS 15 Aarch64	1m 46s
Assembly tests	53s
Verify header translator output	52s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Check framework features	0s
Test Compiler-RT	20s
Test GNUStep with libobjc2 v1.9	1m 2s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.0	1m 5s
Compiler UI	42s
Test GNUStep with libobjc2 v2.1 on nightly	52s
Test GNUStep 32bit	3m 53s
	22m 10s

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