dpctl: Support dump-flows filters "dpdk" and "partially-offloaded".

dpctl: Support dump-flows filters "dpdk" and "partially-offloaded".

Flows that are offloaded via DPDK can be partially offloaded (matches
only) or fully offloaded (matches and actions). Set partially offloaded
display to (offloaded=partial, dp:ovs), and fully offloaded to
(offloaded=yes, dp:dpdk). Also support filter types "dpdk" and
"partially-offloaded".

Signed-off-by: Eli Britstein <elibr@mellanox.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>