[K/N] Migrate some cinterop tests to new test infra

native/native.tests/testData/CInterop/executable/auxiliarySources/auxiliarySources.aux.h

@@ -0,0 +1,9 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char* name();
+
+#ifdef __cplusplus
+}
+#endif

native/native.tests/testData/CInterop/executable/auxiliarySources/auxiliarySources.cpp

@@ -0,0 +1,8 @@
+#include <string>
+#include "auxiliarySources.aux.h"
+
+static std::string _name = "Hello from C++";
+
+const char* name() {
+    return _name.c_str();
+}

native/native.tests/testData/CInterop/executable/auxiliarySources/auxiliarySources.def

@@ -0,0 +1,2 @@
+# The def file is empty intentianally
+# `auxiliarySources.aux.h` is meant to be included via `-header` option of cinterop tool

native/native.tests/testData/CInterop/executable/auxiliarySources/auxiliarySources.kt

@@ -0,0 +1,9 @@
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
+
+import auxiliarySources.*
+import kotlin.test.*
+import kotlinx.cinterop.*
+
+fun main() {
+    assertEquals(name()!!.toKString(), "Hello from C++")
+}