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/utilityClass1.kt

@@ -0,0 +1,9 @@
+object Util {
+    public fun util1() {
+    }
+
+    public fun util2() {
+    }
+
+    public val CONSTANT: Int = 10
+}