fix(ios): Use conditional import for SentrySwizzle.h #8811

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	3s
detect-changes / Detect file changes	5s
diff_check / diff_check	10s
Build ios dev dynamic-frameworks	5m 13s
Build ios production dynamic-frameworks	6m 32s
Build ios dev no-frameworks	6m 18s
Build ios production no-frameworks	6m 2s
Build web	-1s
Build android ${{ matrix.build-type }}	-1s
	24m 21s

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