fix: codegen generated headers are public on ios (#737) #898

Job	Run time
build (macos, fabric-view, kotlin-objc)	13m 53s
build (macos, legacy-module, cpp)	2m 22s
build (macos, legacy-module, kotlin-swift)	2m 21s
build (macos, legacy-view, kotlin-swift)	1m 55s
build (macos, legacy-module, kotlin-objc)	2m 27s
build (macos, legacy-view, kotlin-objc)	2m 22s
build (macos, turbo-module, cpp)	2m 7s
build (macos, turbo-module, kotlin-objc)	2m 38s
build (ubuntu, fabric-view, kotlin-objc)	1m 39s
build (ubuntu, legacy-module, cpp)	1m 42s
build (ubuntu, legacy-module, kotlin-swift)	1m 31s
build (ubuntu, legacy-module, kotlin-objc)	1m 43s
build (ubuntu, legacy-view, kotlin-swift)	1m 22s
build (ubuntu, library, js)	2m 1s
build (ubuntu, legacy-view, kotlin-objc)	1m 30s
build (ubuntu, turbo-module, cpp)	1m 28s
build (ubuntu, turbo-module, kotlin-objc)	1m 27s
	44m 28s

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