Add ir interpreter tests

compiler/testData/ir/interpreter/inKeyword.kt

@@ -0,0 +1,20 @@
+import kotlin.collections.*
+
+@CompileTimeCalculation
+fun numberIsInArray(array: IntArray, number: Int): Boolean {
+    return number in array
+}
+
+@CompileTimeCalculation
+fun valueIsInArray(array: Array<Any>, value: Any?): Boolean {
+    return value in array
+}
+
+const val a1 = <!EVALUATED: `true`!>numberIsInArray(intArrayOf(1, 2, 3), 1)<!>
+const val a2 = <!EVALUATED: `false`!>numberIsInArray(intArrayOf(1, 2, 3), -1)<!>
+
+const val b1 = <!EVALUATED: `true`!>valueIsInArray(arrayOf(1, 2, 3), 1)<!>
+const val b2 = <!EVALUATED: `false`!>valueIsInArray(arrayOf(1, 2, 3), -1)<!>
+const val b3 = <!EVALUATED: `true`!>valueIsInArray(arrayOf(1, 2.0f, "3"), "3")<!>
+const val b4 = <!EVALUATED: `false`!>valueIsInArray(arrayOf(1, 2.0f, "3"), null)<!>
+const val b5 = <!EVALUATED: `false`!>valueIsInArray(arrayOf(1, 2.0f, "3"), 1.0f)<!>