Allow resolve class declarations in class objects

Use INACCESSIBLE_OUTER_CLASS_EXPRESSION error for marking already resolved elements

 #KT-3261 Fixed

compiler/testData/diagnostics/tests/inner/classesInClassObjectHeader.kt

@@ -0,0 +1,11 @@
+class Test {
+    [`InnerAnnotation`InnerAnnotation]
+    class object : StaticClass(), <!INACCESSIBLE_OUTER_CLASS_EXPRESSION!><!MANY_CLASSES_IN_SUPERTYPE_LIST!>InnerClass<!>()<!> {
+
+    }
+
+    annotation class InnerAnnotation
+    open class StaticClass
+
+    open inner class InnerClass
+}