Support type aliases as bare types after 'is/as'.

compiler/testData/codegen/box/typealias/typeAliasAsBareType.kt

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+
+typealias L<T> = List<T>
+
+fun box(): String {
+    val test: Collection<Int> = listOf(1, 2, 3)
+    if (test !is L) return "test !is L"
+    val test2 = test as L
+    if (test.toList() != test2) return "test.toList() != test2"
+    return "OK"
+}