Rollup merge of #126258 - oli-obk:recursive_rpit, r=lcnr

Do not define opaque types when selecting impls

fixes #126117

r? `@lcnr` for inconsistency with next solver

compiler/rustc_trait_selection/src/traits/select/mod.rs

@@ -2563,7 +2563,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
         let InferOk { obligations, .. } = self
             .infcx
             .at(&cause, obligation.param_env)
-            .eq(DefineOpaqueTypes::Yes, placeholder_obligation_trait_ref, impl_trait_ref)
+            .eq(DefineOpaqueTypes::No, placeholder_obligation_trait_ref, impl_trait_ref)
             .map_err(|e| {
                 debug!("match_impl: failed eq_trait_refs due to `{}`", e.to_string(self.tcx()))
             })?;