Rollup merge of #138929 - oli-obk:assoc-ctxt-of-trait, r=compiler-errors

Visitors track whether an assoc item is in a trait impl or an inherent impl

`AssocCtxt::Impl` now contains an `of_trait` field. This allows ast lowering and nameres to not have to track whether we're in a trait impl or an inherent impl.

compiler/rustc_resolve/src/macros.rs

@@ -264,7 +264,7 @@ impl<'ra, 'tcx> ResolverExpand for Resolver<'ra, 'tcx> {
             }
             InvocationKind::Bang { ref mac, .. } => (&mac.path, MacroKind::Bang),
             InvocationKind::Derive { ref path, .. } => (path, MacroKind::Derive),
-            InvocationKind::GlobDelegation { ref item } => {
+            InvocationKind::GlobDelegation { ref item, .. } => {
                 let ast::AssocItemKind::DelegationMac(deleg) = &item.kind else { unreachable!() };
                 deleg_impl = Some(self.invocation_parent(invoc_id));
                 // It is sufficient to consider glob delegation a bang macro for now.