test: serialized_action_test: add test_serialized_action_exception
test: serialized_action_test: add test_serialized_action_exception

Tests that the exceptional future returned by the serialized action
is propagated to trigger, reproducing #7352.

The test fails without the previoud patch:
"serialized_action: trigger: include also semaphore status to promise"

Signed-off-by: Benny Halevy <23c997c90eb8537635e9392d48e7af1bf1b2ca22@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla