Also apply panic_fmt lint suggestions to debug_assert!().

library/core/src/macros/mod.rs

@@ -163,6 +163,7 @@ macro_rules! assert_ne {
 /// ```
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
+#[cfg_attr(not(bootstrap), rustc_diagnostic_item = "debug_assert_macro")]
 macro_rules! debug_assert {
     ($($arg:tt)*) => (if $crate::cfg!(debug_assertions) { $crate::assert!($($arg)*); })
 }