Remove unsafe from some vision framework functions #3155

Job	Run time
Check MSRV	44s
Check formatting	17s
Lint macOS x86_64	2m 29s
Lint iOS ARMv7s	2m 19s
Lint visionOS Aarch64 simulator	3m 3s
Lint GNUStep + exceptions	1m 24s
Lint header-translator	31s
Lint test-assembly	26s
Test macOS 15 Aarch64	1m 19s
Verify header translator output	1m 9s
${{ ((matrix.test && 'Test') \|\| 'Build') }} ${{ matrix.name }}	0s
Check framework features	0s
Assembly tests	49s
Test Compiler-RT	25s
Test GNUStep with libobjc2 v1.9	1m 12s
Compiler UI	45s
Test GNUStep with libobjc2 v2.0	1m 21s
Test on iOS simulator w. dinghy	0s
Test GNUStep with libobjc2 v2.1 on nightly	1m 0s
Test GNUStep 32bit	1m 14s
	20m 27s

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