app/testpmd: fix use of indirect action after port close

app/testpmd: fix use of indirect action after port close

When a port was closed, indirect actions could remain
with their handles no longer valid.
If a newly attached device was assigned the same ID as the closed port,
those indirect actions became accessible again.
Any attempt to use them resulted in an undefined behavior.
Automatically flush indirect actions when a port is closed.

Fixes: 4b61b8774be9 ("ethdev: introduce indirect flow action")
Cc: stable@dpdk.org
Signed-off-by: Dmitry Kozlyuk <dkozlyuk@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
Acked-by: Aman Singh <aman.deep.singh@intel.com>