net/mlx5: simplify sample attributes
net/mlx5: simplify sample attributes

Currently, the sample action resource already has ft_type to indicate
the action domain attribute, the extra flow attributes parameter can
be optimized.

This commit uses action resource ty_type as domain attribute instead of
the flow attribute.

Signed-off-by: Suanming Mou <ffae22abfb44f67da81795938a64e892585787cc@nvidia.com>
Acked-by: Matan Azrad <6969f5f553ad7652679a585a85d7321babc90464@nvidia.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk