[K/N] Add workaround for NS_FORMAT_ARGUMENT(A)

See KT-48807 for explanation

kotlin-native/runtime/src/mm/cpp/AppStateTrackingUIKit.mm

@@ -9,11 +9,7 @@
 
 #include <functional>
 
-// Workaround from https://youtrack.jetbrains.com/issue/KT-48807#focus=Comments-27-5210791.0-0
-// TODO: remove this once our clang supports NSAttributedString as a valid return from the formatter function.
-#define NS_FORMAT_ARGUMENT(x)
 #import <UIKit/UIApplication.h>
-#undef NS_FORMAT_ARGUMENT
 
 #include "CompilerConstants.hpp"
 #include "objc_support/NSNotificationSubscription.hpp"

kotlin-native/shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/ClangArgs.kt

@@ -65,7 +65,10 @@ sealed class ClangArgs(
                     "USE_PE_COFF_SYMBOLS=1".takeIf { target.binaryFormat() == BinaryFormat.PE_COFF },
                     "UNICODE".takeIf { target.family == Family.MINGW },
                     "USE_WINAPI_UNWIND=1".takeIf { target.supportsWinAPIUnwind() },
-                    "USE_GCC_UNWIND=1".takeIf { target.supportsGccUnwind() }
+                    "USE_GCC_UNWIND=1".takeIf { target.supportsGccUnwind() },
+                    // Clang 11 does not support this attribute. We don't need to handle it properly,
+                    // so just undefine it.
+                    "NS_FORMAT_ARGUMENT(A)=".takeIf { target.family.isAppleFamily },
             )
             val customOptions = target.customArgsForKonanSources()
             return (konanOptions + otherOptions + customOptions).map { "-D$it" }