Rollup merge of #142687 - cjgillot:less-hir_crate, r=oli-obk

Reduce uses of `hir_crate`.

I tried rebasing my old incremental-HIR branch. This is a by-product, which is required if we want to get rid of `hir_crate` entirely.

The second commit is a drive-by cleanup. It can be pulled into its own PR.

r? ````@oli-obk````

compiler/rustc_hir_analysis/src/check/mod.rs

@@ -311,9 +311,7 @@ fn default_body_is_unstable(
         reason: reason_str,
     });
 
-    let inject_span = item_did
-        .as_local()
-        .and_then(|id| tcx.crate_level_attribute_injection_span(tcx.local_def_id_to_hir_id(id)));
+    let inject_span = item_did.is_local().then(|| tcx.crate_level_attribute_injection_span());
     rustc_session::parse::add_feature_diagnostics_for_issue(
         &mut err,
         &tcx.sess,