[fix](cloud) Fix double assignment in recycler_service.cpp that cause… (#64168)

Fix undefined behavior in RecyclerServiceImpl::statistics_recycle where
'to_recycle_bytes' was assigned twice in the same expression:
  int64_t to_recycle_bytes = to_recycle_bytes = ...

This triggers -Werror=sequence-point on GCC and breaks cloud build.

Introduced by: #55455

Author: deardeng

cloud/src/recycler/recycler_service.cpp

@@ -239,7 +239,7 @@ void RecyclerServiceImpl::statistics_recycle(StatisticsRecycleRequest& req, Meta
         std::ranges::for_each(resource_types, [&](const auto& resource_type) {
             int64_t to_recycle_num =
                     g_bvar_recycler_instance_last_round_to_recycle_num.get({id, resource_type});
-            int64_t to_recycle_bytes = to_recycle_bytes =
+            int64_t to_recycle_bytes =
                     g_bvar_recycler_instance_last_round_to_recycle_bytes.get({id, resource_type});
 
             ss << "Task Type: " << resource_type << "\n";