Do not generate unnecessary super-call checks for functions with defaults

Such check should only be generated for a function in an open class

 #KT-11962 Fixed

compiler/testData/codegen/box/defaultArguments/superCallCheck.kt

@@ -3,25 +3,25 @@
 
 // WITH_RUNTIME
 
-fun def(i: Int = 0): Int {
-    return i;
+open class MyClass {
+    fun def(i: Int = 0): Int {
+        return i
+    }
 }
 
 fun box():String {
-    val clazz = Class.forName("SuperCallCheckKt")
-
-    val method = clazz.getMethod("def\$default", Int::class.java, Int::class.java, Any::class.java)
-    val result = method.invoke(null, -1, 1, null)
+    val method = MyClass::class.java.getMethod("def\$default", MyClass::class.java, Int::class.java, Int::class.java, Any::class.java)
+    val result = method.invoke(null, MyClass(), -1, 1, null)
 
     if (result != 0) return "fail 1: $result"
 
     var failed = false
     try {
-        method.invoke(null, -1, 1, "fail")
-    } catch(e: Exception) {
+        method.invoke(null, MyClass(), -1, 1, "fail")
+    }
+    catch(e: Exception) {
         val cause = e.cause
-        if (cause is java.lang.UnsupportedOperationException &&
-            cause.message!!.startsWith("Super calls")) {
+        if (cause is UnsupportedOperationException && cause.message!!.startsWith("Super calls")) {
             failed = true
         }
     }