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

compiler/testData/diagnostics/tests/enum/kt8972_cloneNotAllowed.fir.kt

@@ -0,0 +1,7 @@
+// !WITH_NEW_INFERENCE
+enum class E : Cloneable {
+    A;
+    override fun clone(): Any {
+        return super.clone()
+    }
+}