Do not suggest "add inner" quick fix for interfaces etc. #KT-18396 Fixed

idea/testData/quickfix/modifiers/nestedObject.kt

@@ -0,0 +1,8 @@
+// "Add 'inner' modifier" "false"
+// ACTION: Create test
+// ERROR: Object is not allowed here
+class A() {
+    inner class B() {
+        object <caret>C
+    }
+}