Rename hir_attrs query as hir_attr_map.

To make room for the moving of `Map::attrs` to `TyCtxt::hir_attrs` in
the next commit. (It makes sense to rename the query, because it has
many fewer uses than the method.)

compiler/rustc_lint/src/levels.rs

@@ -152,7 +152,7 @@ fn lints_that_dont_need_to_run(tcx: TyCtxt<'_>, (): ()) -> FxIndexSet<LintId> {
 #[instrument(level = "trace", skip(tcx), ret)]
 fn shallow_lint_levels_on(tcx: TyCtxt<'_>, owner: hir::OwnerId) -> ShallowLintLevelMap {
     let store = unerased_lint_store(tcx.sess);
-    let attrs = tcx.hir_attrs(owner);
+    let attrs = tcx.hir_attr_map(owner);
 
     let mut levels = LintLevelsBuilder {
         sess: tcx.sess,