[Test] Merge box against java testdata into codegen black box testsdata

compiler/testData/codegen/enum/nameConflict.kt

@@ -0,0 +1,22 @@
+// DONT_TARGET_EXACT_BACKEND: JS JS_IR JS_IR_ES6 WASM NATIVE
+// MODULE: lib
+// FILE: C.java
+public enum C {
+    OK(0);
+
+    private final int ordinal;
+
+    C(int ordinal) { this.ordinal = ordinal; }
+
+    public int getOrdinal() { return ordinal; }
+}
+
+// MODULE: main(lib)
+// FILE: 1.kt
+fun box(): String {
+    val ok = C.OK
+    return when (ok) {
+        C.OK -> "OK"
+        else -> "fail"
+    }
+}