[K/N][Tests] Move codegen test sources interfaceCallsNCasts..vector

^KT-61259

native/native.tests/testData/codegen/intrinsics/interop_convertNI.kt

@@ -0,0 +1,21 @@
+
+@file:OptIn(ExperimentalForeignApi::class)
+import kotlin.test.*
+import kotlinx.cinterop.*
+
+fun convertIntToShortOrNull(i: Int, b: Boolean): Short? = if (b) i.convert() else null
+fun narrowIntToShortOrNull(i: Int, b: Boolean): Short? = if (b) i.narrow() else null
+fun signExtendShortToIntOrNull(i: Short, b: Boolean): Int? = if (b) i.signExtend() else null
+
+fun box(): String {
+    assertNull(convertIntToShortOrNull(0, false))
+    assertEquals(1, convertIntToShortOrNull(1, true))
+
+    assertNull(narrowIntToShortOrNull(2, false))
+    assertEquals(3, narrowIntToShortOrNull(3, true))
+
+    assertNull(signExtendShortToIntOrNull(4, false))
+    assertEquals(5, signExtendShortToIntOrNull(5, true))
+
+    return "OK"
+}