Add ir interpreter tests

compiler/testData/ir/interpreter/generatedStdlib/elementAtOrElse.kt

@@ -0,0 +1,9 @@
+import kotlin.*
+import kotlin.collections.*
+import kotlin.text.*
+
+const val a = listOf(1, 2, 3).<!EVALUATED: `2`!>elementAtOrElse(1) { -1 }<!>
+const val b = listOf(1, 2, 3).<!EVALUATED: `-1`!>elementAtOrElse(4) { -1 }<!>
+const val c = uintArrayOf(1u, 2u, 3u, 4u).<!EVALUATED: `3`!>elementAtOrElse(2) { 0u }<!>
+const val d = "abcd".<!EVALUATED: `c`!>elementAtOrElse(2) { '0' }<!>
+const val e = "abcd".<!EVALUATED: `0`!>elementAtOrElse(4) { '0' }<!>