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/class/ClassShadowing.kt

@@ -1,19 +1,17 @@
 package test
 
-public class Short {
+public class Short(s: String) {
     companion object {
         public fun valueOf(value: String): Short {
-            return Short()
+            return Short(value)
         }
     }
 }
 
-class Test {
-    companion object {
-        public fun test() {
-            test.Short.valueOf("1")
-            test.Short.valueOf("1")
-            java.lang.Short.valueOf("1")
-        }
+object Test {
+    public fun test() {
+        test.Short.valueOf("1")
+        test.Short.valueOf("1")
+        java.lang.Short.valueOf("1")
     }
 }