[FIR2IR] Add problematic test with in/out clash during approximation

compiler/testData/ir/irText/firProblems/V8ArrayToList.kt

@@ -0,0 +1,21 @@
+// FILE: Utils.java
+
+import java.util.*;
+
+public class Utils {
+    public static List<? super Object> toList(final V8Array array) {
+        List<? super Object> list = new ArrayList<Object>();
+        list.add("OK");
+        return list;
+    }
+}
+
+// FILE: v8arrayToList.kt
+
+class V8Array
+
+fun box(): String {
+    val array = V8Array()
+    val list = Utils.toList(array) as List<String>
+    return list[0]
+}