message: fix memory leak as found by CI and solved by detective Muhleisen
diff: @@ -869,8 +869,6 @@ void GroupedAggregateHashTable::Partition(vector<GroupedAggregateHashTable *> &p
  total_count += partition_entry->Size();
  }
  D_ASSERT(total_count == entries);
  - // mark the ht as empty so finalizers are not run
  - entries = 0;
  }
  idx_t GroupedAggregateHashTable::Scan(idx_t &scan_position, DataChunk &result) {
  