Create some minimal HIR for associated opaque types

compiler/rustc_middle/src/arena.rs

@@ -115,6 +115,7 @@ macro_rules! arena_types {
             [] features: rustc_feature::Features,
             [decode] specialization_graph: rustc_middle::traits::specialization_graph::Graph,
             [] crate_inherent_impls: rustc_middle::ty::CrateInherentImpls,
+            [] hir_owner_nodes: rustc_hir::OwnerNodes<'tcx>,
         ]);
     )
 }