Support basic interpretation of IrGetClass

compiler/testData/ir/interpreter/reference/getClass.kt

@@ -0,0 +1,13 @@
+import kotlin.*
+
+fun test(a: Any) = when (a::class) {
+    String::class -> "String"
+    Int::class -> "Int"
+    Boolean::class -> "Boolean"
+    else -> "Else"
+}
+
+const val a = <!EVALUATED: `String`!>test("")<!>
+const val b = <!EVALUATED: `Int`!>test(1)<!>
+const val c = <!EVALUATED: `Boolean`!>test(true)<!>
+const val d = <!EVALUATED: `Else`!>test(2.0)<!>