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

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

@@ -0,0 +1,8 @@
+enum interface Some {
+    // Enum part
+    D;
+
+    // Interface like part
+    fun test()
+    val foo: Int
+}