[DowngradePhp80] Handle combine DowngradeMixedTypeDeclarationRector+DowngradeAttributeToAnnotationRector on declare(strict_types=1) inline after open php tag

[DowngradePhp80] Handle combine DowngradeMixedTypeDeclarationRector+DowngradeAttributeToAnnotationRector on declare(strict_types=1) inline after open php tag #1375