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

native/native.tests/testData/caches/ic/addMethodToOpenClass2/lib1/lib1.file1.1.kt

@@ -0,0 +1,6 @@
+package test1
+
+open class A {
+    open fun baz() = "qxx"
+    open fun foo() = 117
+}

native/native.tests/testData/caches/ic/addMethodToOpenClass2/lib1/lib1.file1.kt

@@ -0,0 +1,5 @@
+package test1
+
+open class A {
+    open fun foo() = 117
+}

native/native.tests/testData/caches/ic/addMethodToOpenClass2/lib1/lib1.file2.kt

@@ -0,0 +1,5 @@
+package test1
+
+open class B : A() {
+    open fun bar() = "zzz"
+}