Deserialize annotations on classes

First version, not all kinds of value arguments of annotations are supported

compiler/testData/loadKotlin/annotations/classes/ClassInClassObject.txt

@@ -0,0 +1,21 @@
+package test
+
+internal final annotation class Anno : jet.Annotation {
+    /*primary*/ public constructor Anno()
+}
+
+internal final class Class {
+    /*primary*/ public constructor Class()
+    
+    internal class object <class-object-for-Class> {
+        /*primary*/ private constructor <class-object-for-Class>()
+        
+        test.Anno() internal final inner class Inner {
+            /*primary*/ public constructor Inner()
+        }
+        
+        test.Anno() internal final class Nested {
+            /*primary*/ public constructor Nested()
+        }
+    }
+}