Auto merge of #109500 - petrochenkov:modchainld, r=oli-obk

resolve: Preserve reexport chains in `ModChild`ren

This may be potentially useful for
- avoiding uses of `hir::ItemKind::Use` (which usually lead to correctness issues)
- preserving documentation comments on all reexports, including those from other crates
- preserving and checking stability/deprecation info on reexports
- all kinds of diagnostics

The second commit then migrates some hacky logic from rustdoc to `module_reexports` to make it simpler and more correct.
Ideally rustdoc should use `module_reexports` immediately at the top level, so `hir::ItemKind::Use`s are never used.
The second commit also fixes issues with rust-lang/rust#109330 and therefore
Fixes rust-lang/rust#109631
Fixes rust-lang/rust#109614
Fixes rust-lang/rust#109424

std/src/collections/mod.rs

@@ -416,8 +416,10 @@ pub use alloc_crate::collections::{BTreeMap, BTreeSet, BinaryHeap};
 pub use alloc_crate::collections::{LinkedList, VecDeque};
 
 #[stable(feature = "rust1", since = "1.0.0")]
+#[doc(inline)]
 pub use self::hash_map::HashMap;
 #[stable(feature = "rust1", since = "1.0.0")]
+#[doc(inline)]
 pub use self::hash_set::HashSet;
 
 #[stable(feature = "try_reserve", since = "1.57.0")]