[IR] add testdata for dumpKotlinLike

compiler/testData/ir/irText/regressions/coercionInLoop.kt.txt

@@ -0,0 +1,18 @@
+fun box(): String {
+  val a: DoubleArray = TODO("IrConstructorCall")
+  val x: DoubleIterator = a.iterator()
+  var i: Int = 0
+  while (x.hasNext()) { //BLOCK
+    when {
+      ieee754equals(arg0 = a.get(index = i), arg1 = x.next()).not() -> return "Fail " + 
+i
+    }
+    { //BLOCK
+      val tmp0: Int = i
+      i = tmp0.inc()
+      tmp0
+    } /*~> Unit */
+  }
+  return "OK"
+}
+