Make DynamicCellSet use VTKM_DEFAULT_CELL_SET_LIST_TAG.
It was previously using vtkm::cont::CellSetListTagCommon which would break the ability for people to specify a custom value for VTKM_DEFAULT_CELL_SET_LIST_TAG.
It was previously using vtkm::cont::CellSetListTagCommon which would break the ability for people to specify a custom value for VTKM_DEFAULT_CELL_SET_LIST_TAG.