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/Sequences.kt

@@ -19,6 +19,11 @@ private object EmptySequence : Sequence<Nothing>, DropTakeSequence<Nothing> {
     override fun take(n: Int) = EmptySequence
 }
 
+internal interface DropTakeSequence<T> : Sequence<T> {
+    fun drop(n: Int): Sequence<T>
+    fun take(n: Int): Sequence<T>
+}
+
 public inline fun <T> Sequence<T>?.orEmpty(): Sequence<T> = this ?: emptySequence()
 
 private class GeneratorSequence<T : Any>(private val getInitialValue: () -> T?, private val getNextValue: (T) -> T?) : Sequence<T> {
@@ -119,4 +124,4 @@ private fun <T> Appendable.appendElement(element: T, transform: ((T) -> CharSequ
         element is Char -> append(element)
         else -> append(element.toString())
     }
-}
+}