[K/N][tests] Added a bunch of tests on incremental compilation

native/native.tests/testData/caches/ic/changeFileIndex/main/main.kt

@@ -0,0 +1,11 @@
+import kotlin.test.*
+
+@Test
+fun checkFoo() {
+    assertEquals(42, foo(intArrayOf(1, 2, 3, 4, 5, 6)) { it * 2 })
+}
+
+@Test
+fun checkBar() {
+    assertEquals(42, bar(intArrayOf(1, 3, 7)) { it * 6 })
+}