[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/enum/inner/insideEnumEntry_after.fir.kt

@@ -0,0 +1,9 @@
+// !LANGUAGE: +NestedClassesInEnumEntryShouldBeInner
+
+enum class E {
+    ABC {
+        enum class F {
+            DEF
+        }
+    }
+}