examples/ip_pipeline: rework flow action CLI

examples/ip_pipeline: rework flow action CLI

All commands merged into one: cmd_action_parsed.

modified bulk command:
action flow bulk
File line format:
flow <flow ID>
meter 0 <cir> <pir> <cbs> <pbs> meter 1 <cir> <pir> <cbs> <pbs> meter 2
<cir> <pir> <cbs> <pbs> meter 3 <cir> <pir> <cbs> <pbs>
policer 0 <action> <action> <action> policer 1 <action> <action>
<action> policer 2 <action> <action> <action> policer 3 <action>
<action> <action>
port <port ID>

Signed-off-by: Marcin Kerlin <marcinx.kerlin@intel.com>
Signed-off-by: Piotr Azarewicz <piotrx.t.azarewicz@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>