compaction_manager: maybe_stop_on_error: rely on retry=false default
compaction_manager: maybe_stop_on_error: rely on retry=false default

No need to set retry to false again in various catch
clauses.

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

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