[Test] Add handler for comparing pretty kt ir dumps

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

@@ -0,0 +1,15 @@
+class V8Array {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+}
+
+fun box(): String {
+  val array: V8Array = V8Array()
+  val list: List<String> = toList(array = array) as List<String>
+  return list.get(index = 0)
+}
+