KT-12797: Fix completion to show inner classes from base class

#KT-12797 fixed

idea/idea-completion/testData/basic/common/InnerInBaseClass.kt

@@ -0,0 +1,15 @@
+
+abstract class A {
+    inner class InnerInA
+}
+
+abstract class B : A() {
+    inner class InnerInB
+}
+
+fun foo(b: B) {
+    val v = b.InnerIn<caret>
+}
+
+// EXIST: InnerInB
+// EXIST: InnerInA

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JSBasicCompletionTestGenerated.java

@@ -470,6 +470,12 @@ public class JSBasicCompletionTestGenerated extends AbstractJSBasicCompletionTes
             doTest(fileName);
         }
 
+        @TestMetadata("InnerInBaseClass.kt")
+        public void testInnerInBaseClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InnerInBaseClass.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("InsideAnonymousClass.kt")
         public void testInsideAnonymousClass() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InsideAnonymousClass.kt");

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JvmBasicCompletionTestGenerated.java

@@ -470,6 +470,12 @@ public class JvmBasicCompletionTestGenerated extends AbstractJvmBasicCompletionT
             doTest(fileName);
         }
 
+        @TestMetadata("InnerInBaseClass.kt")
+        public void testInnerInBaseClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InnerInBaseClass.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("InsideAnonymousClass.kt")
         public void testInsideAnonymousClass() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InsideAnonymousClass.kt");