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

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

@@ -0,0 +1,16 @@
+// !CHECK_TYPE
+// FILE: A.java
+public enum A {
+
+    ENTRY {
+        public String s() {
+            return "s";
+        }
+    };
+    public abstract String s();
+}
+
+// FILE: test.kt
+fun main() {
+    checkSubtype<String?>(A.ENTRY.s())
+}