Tests: fix stdlib declarations in IR interpreter test data

Fix some unresolved supertypes. This is necessary to be able to enable
IR fake override builder by default (KT-61514), because it traverses all
supertypes and asserts that they're classes, so that it can build fake
overrides for declarations from there. Without this change, for example
`IrFakeOverrideBuilder.buildFakeOverridesForClass` would crash.

compiler/testData/ir/interpreter/helpers/Standard.kt

@@ -2,6 +2,10 @@ package kotlin
 
 import kotlin.*
 
+public class NotImplementedError(message: String = "An operation is not implemented.") : Error(message)
+
+public inline fun TODO(): Nothing = throw NotImplementedError()
+
 public inline fun <R> run(block: () -> R): R {
     return block()
 }