Fixed KT-6075 Qualified name inserted when completing class with class object

#KT-6075 Fixed

idea/testData/completion/handlers/multifile/ClassWithClassObject-1.kt

@@ -0,0 +1,5 @@
+fun foo() {
+    KtCla<caret>
+}
+
+// ELEMENT: KtClass

idea/testData/completion/handlers/multifile/ClassWithClassObject-2.kt

@@ -0,0 +1,9 @@
+package pack
+
+class KtClass {
+    fun foo(){}
+
+    class object {
+        fun staticFoo(){}
+    }
+}

idea/testData/completion/handlers/multifile/ClassWithClassObject.kt.after

@@ -0,0 +1,7 @@
+import pack.KtClass
+
+fun foo() {
+    KtClass<caret>
+}
+
+// ELEMENT: KtClass