test/eventdev: move tests to the driver specific list

test/eventdev: move tests to the driver specific list

Same treatment than crypto tests, move the eventdev drivers tests in the
driver list.

While at it:
- eventdev_octeontx_autotest has been renamed as
  eventdev_selftest_octeontx,
- eventdev_sw_autotest has been renamed as
  eventdev_selftest_sw,

Fixes: 50fb749a3972 ("event/octeontx: move test to driver")
Fixes: 85fb515b7318 ("event/sw: move test to driver")
Fixes: 123d67c73b06 ("test/event: register selftests")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Aaron Conole <aconole@redhat.com>