Add ir interpreter tests

compiler/testData/ir/interpreter/doWhileLoop.kt

@@ -0,0 +1,34 @@
+@CompileTimeCalculation
+fun factorialDoWhile(num: Int): Int {
+    var number = num
+    var factorial = 1
+
+    do {
+        factorial *= number
+        number--
+    } while (number > 0)
+
+    return factorial
+}
+
+@CompileTimeCalculation
+fun firstNotNull(array: Array<Int?>): Int {
+    var i = 0
+
+    do {
+        val y = array[i++]
+    } while (y == null)
+
+    return array[i - 1]!!
+}
+
+@CompileTimeCalculation
+fun singleExpressionLoop(incrementTo: Int): Int {
+    var i = 0
+    do i++ while (i < incrementTo)
+    return i
+}
+
+const val a = <!EVALUATED: `720`!>factorialDoWhile(6)<!>
+const val b = <!EVALUATED: `1`!>firstNotNull(arrayOf<Int?>(null, null, 1, 2, null))<!>
+const val c = <!EVALUATED: `10`!>singleExpressionLoop(10)<!>