Sema: Use getDeclaredInterfaceType() in a couple of places

Author: slavapestov

lib/Sema/DerivedConformanceDistributedActor.cpp

@@ -236,7 +236,7 @@ static FuncDecl* createLocalFunc_doInvokeOnReturn(
     auto requirement =
         Requirement(RequirementKind::Conformance,
                     resultGenericParamDecl->getDeclaredInterfaceType(),
-                    p->getInterfaceType()->getMetatypeInstanceType());
+                    p->getDeclaredInterfaceType());
     requirements.push_back(requirement);
   }
   GenericSignature doInvokeGenSig =

lib/Sema/TypeCheckDistributed.cpp

@@ -843,7 +843,7 @@ GetDistributedActorArgumentDecodingMethodRequest::evaluate(Evaluator &evaluator,
   auto *decoder = ctx.getDistributedActorInvocationDecoder(actor);
   assert(decoder);
 
-  auto decoderTy = decoder->getInterfaceType()->getMetatypeInstanceType();
+  auto decoderTy = decoder->getDeclaredInterfaceType();
 
   auto members = TypeChecker::lookupMember(actor->getDeclContext(), decoderTy,
                                            DeclNameRef(ctx.Id_decodeNextArgument));