Task manager task implementations of classes that cover
cleanup keyspace compaction which can be started through
/storage_service/keyspace_compaction/ api.
Top level task covers the whole compaction and creates child
tasks on each shard.
Closes#12712
* github.com:scylladb/scylladb:
test: extend test_compaction_task.py to test cleanup compaction
compaction: create task manager's task for cleanup keyspace compaction on one shard
compaction: create task manager's task for cleanup keyspace compaction
api: add get_table_ids to get table ids from table infos
compaction: create cleanup_compaction_task_impl