[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/serialization/serializedEnumOrdinal.kt

@@ -0,0 +1,29 @@
+// WITH_STDLIB
+// MODULE: lib
+// FILE: lib.kt
+
+enum class Color {
+    RED, GREEN, BLUE, CYAN, MAGENTA, YELLOW
+}
+
+fun determineColor(code: Int): Color = when (code) {
+    0 -> Color.BLUE
+    1 -> Color.MAGENTA
+    else -> Color.CYAN
+}
+
+// MODULE: main(lib)
+// FILE: main.kt
+
+import kotlin.test.*
+
+fun box(): String {
+    assertEquals(0, Color.RED.ordinal)
+    assertEquals(1, Color.GREEN.ordinal)
+    assertEquals(2, Color.BLUE.ordinal)
+    assertEquals(Color.BLUE, determineColor(0))
+    assertEquals(Color.MAGENTA, determineColor(1))
+    assertEquals(Color.CYAN, determineColor(2))
+
+    return "OK"
+}