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/bytecodeText/defaultArguments/kt11962.kt

@@ -0,0 +1,17 @@
+// KT-11962 Super call with default parameters check is generated for top-level function
+
+fun foo(x: Int = 1) { }
+
+class FinalClass {
+    fun bar(x: Int = 2) { }
+}
+
+object Object {
+    fun baz(x: Int = 3) { }
+}
+
+fun test() {
+    fun local(x: Int = 4) { }
+}
+
+// 0 ATHROW