[Distributed] improved return type metadata test and dont allow partial metadata

Author: ktoso

stdlib/public/runtime/MetadataLookup.cpp

@@ -2945,13 +2945,12 @@ swift_func_getReturnTypeInfo(const char *typeNameStart, size_t typeNameLength,
 
   SubstGenericParametersFromMetadata substFn(genericEnv, genericArguments);
 
-  auto request = MetadataRequest(MetadataState::Complete,
-      /*non-blocking*/ true);
+  auto request = MetadataRequest(MetadataState::Complete);
 
   NodePointer nodePointer = resultType->getFirstChild();
   auto typeInfoOrErr = swift_getTypeByMangledNode(
       request, demangler, nodePointer,
-      /*arguments=*/{},
+      /*arguments=*/genericArguments,
       /*substGenericParam=*/
       [&substFn](unsigned depth, unsigned index) {
         return substFn.getMetadata(depth, index).Ptr;