fix: Move header reference out of `extern C` #5255

Job	Run time
Build UITests (macos-12, 13.4.1)	5m 30s
Build UITests (macos-13, 14.3)	7m 12s
Run UI Tests for iOS-16 on Sauce Labs	8m 5s
Run UI Tests for iOS-15 on Sauce Labs	20m 22s
Run UI Tests for iPhone-Pro on Sauce Labs	10m 53s
Run UI Tests for iOS-14 on Sauce Labs	33m 39s
Run UI Tests for iOS-13 on Sauce Labs	16m 59s
Run UI Tests for iOS-12 on Sauce Labs	7m 49s
	1h 50m 29s

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