Update test suite to nightly-2023-08-05

error: the feature `lang_items` is internal to the compiler or standard library
     --> src/main.rs:1:12
      |
    1 | #![feature(lang_items, start)]
      |            ^^^^^^^^^^
      |
      = note: using it is strongly discouraged
      = note: `#[deny(internal_features)]` on by default

test_suite/no_std/src/main.rs

@@ -1,3 +1,4 @@
+#![allow(internal_features)]
 #![feature(lang_items, start)]
 #![no_std]