Extract Function: Fix extraction of reference to class object property

#KT-5053 Fixed

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

@@ -0,0 +1,18 @@
+// SIBLING:
+class MyClass {
+    fun test() {
+        unit()
+    }
+
+    public class P {
+        class object {
+            val a = 1
+            fun foo() = 1
+        }
+    }
+}
+
+fun unit() {
+    MyClass.P.foo()
+    MyClass.P.a
+}