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

^KT-65979

compiler/testData/codegen/box/enum/multipleModules.kt

@@ -0,0 +1,24 @@
+// WITH_STDLIB
+// MODULE: lib
+// FILE: lib.kt
+
+package a
+
+enum class A(val x: Int) {
+    Z1(42),
+    Z2(117),
+    Z3(-1)
+}
+
+// MODULE: main(lib)
+// FILE: main.kt
+
+import a.*
+import kotlin.test.*
+
+fun box(): String {
+    assertEquals(42, A.Z1.x)
+    assertEquals(117, A.valueOf("Z2").x)
+    assertEquals(-1, A.values()[2].x)
+    return "OK"
+}