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

compiler/testData/diagnostics/tests/enum/extendingEnumDirectly.fir.kt

@@ -0,0 +1,9 @@
+class Test1 : Enum<Test1>("", 0)
+
+class Outer {
+    class Test2 : Enum<Test2>("", 0)
+}
+
+fun outer() {
+    class Test3 : Enum<Test3>("", 0)
+}