Auto merge of rust-lang#122113 - matthiaskrgr:rollup-5d1jnwi, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#121958 (Fix redundant import errors for preload extern crate)
 - rust-lang#121976 (Add an option to have an external download/bootstrap cache)
 - rust-lang#122022 (loongarch: add frecipe and relax target feature)
 - rust-lang#122026 (Do not try to format removed files)
 - rust-lang#122027 (Uplift some feeding out of `associated_type_for_impl_trait_in_impl` and into queries)
 - rust-lang#122063 (Make the lowering of `thir::ExprKind::If` easier to follow)
 - rust-lang#122074 (Add missing PartialOrd trait implementation doc for array)
 - rust-lang#122082 (remove outdated fixme comment)
 - rust-lang#122091 (Note why we're using a new thread in `test_get_os_named_thread`)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

core/src/array/mod.rs

@@ -360,6 +360,7 @@ where
     }
 }
 
+/// Implements comparison of arrays [lexicographically](Ord#lexicographical-comparison).
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: PartialOrd, const N: usize> PartialOrd for [T; N] {
     #[inline]

std/src/thread/tests.rs

@@ -80,6 +80,7 @@ fn test_named_thread_truncation() {
 #[test]
 fn test_get_os_named_thread() {
     use crate::sys::thread::Thread;
+    // Spawn a new thread to avoid interfering with other tests running on this thread.
     let handler = thread::spawn(|| {
         let name = c"test me please";
         Thread::set_name(name);