[PL] ABI compatibility tests for reworked partial linkage

compiler/testData/klibABI/removeClass/lib1/l1.kt

@@ -0,0 +1,15 @@
+class Class {
+    fun f() = "FAIL: Class.f"
+    val p get() = "FAIL: Class.p"
+    override fun toString() = "FAIL: Class.toString"
+}
+
+class RemovedClass {
+    fun f() = "FAIL: RemovedClass.f"
+    val p get() = "FAIL: RemovedClass.p"
+}
+
+abstract class RemovedAbstractClass
+interface RemovedInterface
+
+open class RemovedOpenClass

compiler/testData/klibABI/removeClass/lib1/l1.kt.1

@@ -0,0 +1,15 @@
+class Class {
+    fun f() = "Class.f"
+    val p get() = "Class.p"
+    override fun toString() = "Class"
+}
+
+//class RemovedClass {
+//    fun f() = "FAIL: RemovedClass.f"
+//    val p get() = "FAIL: RemovedClass.p"
+//}
+
+//abstract class RemovedAbstractClass
+//interface RemovedInterface
+
+//open class RemovedOpenClass

compiler/testData/klibABI/removeClass/lib1/module.info

@@ -0,0 +1,6 @@
+STEP 0:
+    dependencies: stdlib
+STEP 1:
+    dependencies: stdlib
+    modifications:
+        U : l1.kt.1 -> l1.kt