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

^KT-61259

kotlin-native/backend.native/tests/link/purge1/lib.kt

@@ -1,15 +0,0 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
-
-import kotlinx.cinterop.convert
-import platform.posix.*
-
-fun foo() {
-    println("linked library")
-    val size: size_t = 17.convert<size_t>()
-    val e = fabs(1.toDouble())
-    println("and symbols from posix available: $size; $e")
-}

kotlin-native/backend.native/tests/link/purge1/prog.kt

@@ -1,9 +0,0 @@
-/*
- * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-
-fun main(args: Array<String>) {
-    foo()
-}

kotlin-native/backend.native/tests/link/purge1/prog.out

@@ -1,2 +0,0 @@
-linked library
-and symbols from posix available: 17; 1.0