Add case for private nested class/object in KotlinSafeDeleteProcessor

idea/testData/refactoring/safeDelete/deleteObject/kotlinObject/nestedObject3.kt

@@ -0,0 +1,7 @@
+import TestClass.NamedObject
+
+class TestClass{
+    private object NamedObject<caret> {
+        const val CONST = "abc"
+    }
+}