Extract Function: Fix extraction of reference to class object property

#KT-5053 Fixed

idea/testData/refactoring/extractFunction/parameters/misc/qualifiedClassObject.kt

@@ -0,0 +1,14 @@
+// SIBLING:
+class MyClass {
+    fun test() {
+        <selection>P.foo()
+        P.a</selection>
+    }
+
+    public class P {
+        class object {
+            val a = 1
+            fun foo() = 1
+        }
+    }
+}