Auto merge of rust-lang#83723 - cjgillot:ownernode, r=petrochenkov

Store all HIR owners in the same container

This replaces the previous storage in a BTreeMap for each of Item/ImplItem/TraitItem/ForeignItem.
This should allow for a more compact storage.

Based on rust-lang#83114

clippy_lints/src/missing_doc.rs

@@ -106,7 +106,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingDoc {
 
     fn check_crate(&mut self, cx: &LateContext<'tcx>, krate: &'tcx hir::Crate<'_>) {
         let attrs = cx.tcx.hir().attrs(hir::CRATE_HIR_ID);
-        self.check_missing_docs_attrs(cx, attrs, krate.item.inner, "the", "crate");
+        self.check_missing_docs_attrs(cx, attrs, krate.module().inner, "the", "crate");
     }
 
     fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx hir::Item<'_>) {