Also add a debug-only compaction-manager-side assertion that tests that no new compaction tasks were submitted for a table that is being removed (debug-only because not constant-time). Fixes #9448. Signed-off-by: Michael Livshin <michael.livshin@scylladb.com> Message-Id: <20211007110416.159110-1-michael.livshin@scylladb.com>