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

native/native.tests/testData/caches/ic/addDeleteFile/main/main.1.kt

@@ -0,0 +1,7 @@
+import kotlin.test.*
+
+@Test
+fun runTest() {
+    assertEquals(42, foo())
+    assertEquals(117, bar())
+}

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

@@ -0,0 +1,4 @@
+import kotlin.test.*
+
+@Test
+fun runTest() = assertEquals(42, foo())