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

compiler/testData/diagnostics/tests/duplicateJvmSignature/specialNames/enum.fir.kt

@@ -0,0 +1,7 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+enum class E {
+    A;
+
+    fun values(): Array<E> = null!!
+    fun valueOf(s: String): E = null!!
+}