[K/N][tests] Migrate first platform-dependent test to new testing infra

^KT-61259

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

@@ -0,0 +1,23 @@
+// MODULE: lib
+// FILE: lib.kt
+
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
+
+import kotlinx.cinterop.convert
+import platform.posix.*
+
+fun foo(): String {
+    val size: size_t = 17.convert<size_t>()
+    val e = fabs(1.toDouble())
+    return "$size; $e"
+}
+
+// MODULE: main(lib)
+// FILE: main.kt
+
+import kotlin.test.*
+
+fun box(): String {
+    assertEquals("17; 1.0", foo())
+    return "OK"
+}