Make DataTargetVisitor package-private

Closes gh-17561

config/src/main/java/org/springframework/security/config/annotation/method/configuration/AuthorizationProxyDataConfiguration.java

@@ -49,7 +49,7 @@ final class AuthorizationProxyDataConfiguration implements AopInfrastructureBean
 		return new DataTargetVisitor();
 	}
 
-	private static final class DataTargetVisitor implements AuthorizationAdvisorProxyFactory.TargetVisitor, Ordered {
+	static final class DataTargetVisitor implements AuthorizationAdvisorProxyFactory.TargetVisitor, Ordered {
 
 		private static final int DEFAULT_ORDER = 200;