Auto merge of #144272 - petrochenkov:disambunder2, r=oli-obk

resolve: Make disambiguators for underscore bindings module-local (take 2)

The difference with https://github.com/rust-lang/rust/pull/144013 can be seen in the second commit.

Now we just keep a separate disambiguator counter in every `Module`, instead of a global counter in `Resolver`.
This will be ok for parallel import resolution because we'll need to lock the module anyway when updating `resolutions` and other fields in it.
And for external modules the disabmiguator could be just passed as an argument to `define_extern`, without using any cells or locks, once https://github.com/rust-lang/rust/pull/143884 lands.

Unblocks https://github.com/rust-lang/rust/pull/143884.

compiler/rustc_resolve/src/macros.rs

@@ -535,7 +535,7 @@ impl<'ra, 'tcx> ResolverExpand for Resolver<'ra, 'tcx> {
         target_trait.for_each_child(self, |this, ident, ns, _binding| {
             // FIXME: Adjust hygiene for idents from globs, like for glob imports.
             if let Some(overriding_keys) = this.impl_binding_keys.get(&impl_def_id)
-                && overriding_keys.contains(&BindingKey::new(ident.normalize_to_macros_2_0(), ns))
+                && overriding_keys.contains(&BindingKey::new(ident, ns))
             {
                 // The name is overridden, do not produce it from the glob delegation.
             } else {