Rollup merge of #126301 - nnethercote:sort-crate-attributes, r=davidtwco

Use `tidy` to sort crate attributes for all compiler crates.

We already do this for a number of crates, e.g. `rustc_middle`, `rustc_span`, `rustc_metadata`, `rustc_span`, `rustc_errors`.

For the ones we don't, in many cases the attributes are a mess.
- There is no consistency about order of attribute kinds (e.g. `allow`/`deny`/`feature`).
- Within attribute kind groups (e.g. the `feature` attributes), sometimes the order is alphabetical, and sometimes there is no particular order.
- Sometimes the attributes of a particular kind aren't even grouped all together, e.g. there might be a `feature`, then an `allow`, then another `feature`.

This commit extends the existing sorting to all compiler crates, increasing consistency. If any new attribute line is added there is now only one place it can go -- no need for arbitrary decisions.

Exceptions:
- `rustc_log`, `rustc_next_trait_solver` and `rustc_type_ir_macros`, because they have no crate attributes.
- `rustc_codegen_gcc`, because it's quasi-external to rustc (e.g. it's ignored in `rustfmt.toml`).

r? `@davidtwco`

compiler/rustc_trait_selection/src/lib.rs

@@ -10,12 +10,12 @@
 //!
 //! This API is completely unstable and subject to change.
 
-#![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
-#![doc(rust_logo)]
-#![feature(rustdoc_internals)]
+// tidy-alphabetical-start
 #![allow(internal_features)]
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
+#![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
+#![doc(rust_logo)]
 #![feature(assert_matches)]
 #![feature(associated_type_defaults)]
 #![feature(box_patterns)]
@@ -24,8 +24,10 @@
 #![feature(if_let_guard)]
 #![feature(let_chains)]
 #![feature(never_type)]
+#![feature(rustdoc_internals)]
 #![feature(type_alias_impl_trait)]
 #![recursion_limit = "512"] // For rustdoc
+// tidy-alphabetical-end
 
 #[macro_use]
 extern crate tracing;