Dropping package facades:

- light classes: do not generate light class for package facade
- drop package facades as multifile classes compilation mode support
- get rid of some additional package facade fqName usages
- update tests for light classes

compiler/tests/org/jetbrains/kotlin/codegen/AnnotationGenTest.java

@@ -38,10 +38,6 @@ public class AnnotationGenTest extends CodegenTestCase {
         return generateAndCreateClassLoader();
     }
 
-    private Class<?> getPackageClass(@NotNull ClassLoader loader) throws ClassNotFoundException {
-        return loader.loadClass(PackageClassUtils.getPackageClassName(myFiles.getPsiFile().getPackageFqName()));
-    }
-
     private Class<?> getPackageSrcClass(@NotNull ClassLoader loader) throws ClassNotFoundException {
         return loader.loadClass(PackagePartClassUtils.getPackagePartInternalName(myFiles.getPsiFile()));
     }