[Native][Tests] Move existing CExport tests under the InterfaceV1 dir

To avoid collisions with the future InterfaceNone tests

native/native.tests/testData/CExport/InterfaceV1/smoke0/main.c

@@ -0,0 +1,7 @@
+#include "smoke0_api.h"
+
+int main() {
+    if (foo() != 42) {
+        return -1;
+    }
+}