For all compaction types which can be started with api, add an asynchronous version of api, which returns task_id of the corresponding task manager task. With the task_id a user can check task status, abort, or wait for it, using task manager api.
Closesscylladb/scylladb#15092
* github.com:scylladb/scylladb:
test: use async api in test_not_created_compaction_task_abort
test: test compaction task started asynchronously
api: tasks: api for starting async compaction
api: compaction: pass pointer to top level compaction tasks