[K/N][tests] Migrate link tests to new testing infra ^KT-61259

native/native.tests/testData/codegen/link/omitUnused.kt

@@ -0,0 +1,13 @@
+// MODULE: lib
+// FILE: lib.kt
+
+package foo
+
+fun foo() {}
+
+// MODULE: main(lib)
+// FILE: main.kt
+
+// TODO: This test should be checking that there's no foo in the resulting binary.
+
+fun box(): String = "OK"