use sync verion of make_pinned_vector

Signed-off-by: Jigao Luo <[email protected]>

Author: JigaoLuo

cpp/include/cudf/reduction/detail/reduction.cuh

@@ -66,7 +66,7 @@ std::unique_ptr<scalar> reduce(InputIterator d_in,
 {
   auto const binary_op     = cudf::detail::cast_functor<OutputType>(op.get_binary_op());
   auto const initial_value = init.value_or(op.template get_identity<OutputType>());
-  auto pinned_initial = cudf::detail::make_pinned_vector_async<OutputType>(1, stream);
+  auto pinned_initial = cudf::detail::make_pinned_vector<OutputType>(1, stream);
   pinned_initial[0] = initial_value;
   using ScalarType         = cudf::scalar_type_t<OutputType>;
   auto result = std::make_unique<ScalarType>(pinned_initial[0], true, stream, mr);