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

native/native.tests/testData/caches/ic/addMethodToInterface1/lib1/lib1.1.kt

@@ -0,0 +1,6 @@
+package test1
+
+interface I {
+    fun baz(): String
+    fun foo(): Int
+}

native/native.tests/testData/caches/ic/addMethodToInterface1/lib1/lib1.kt

@@ -0,0 +1,5 @@
+package test1
+
+interface I {
+    fun foo(): Int
+}