[K/N][Tests] Move some codegen tests to new infra: annotations..coroutines

^KT-61259

native/native.tests/testData/codegen/basics/unit2.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+package codegen.basics.unit2
+
+import kotlin.test.*
+
+@Test
+fun runTest() {
+    val x = foo()
+    println(x.toString())
+}
+
+fun foo() {
+    return Unit
+}