KT-5287 J2K: Convert class with private constructor and static functions to "object" instead of class with "class object"

#KT-5287 Fixed

j2k/testData/fileOrElement/issues/doNotQualifyStatic.kt

@@ -1,12 +1,9 @@
-class Outer {
+object Outer {
+    public var o: Any? = Object()
 
     public class Nested {
         public fun foo() {
             o = null
         }
     }
-
-    companion object {
-        public var o: Any? = Object()
-    }
-}
+}