Garbage collector: use the newer approach of background tasks connected with Redis. This would make the GC scalable, and we could reuse the logic of the unique background tasks

[pcrespov]

          Idea: At some point, we could refactor the garbage collection (GC) and use the newer approach of background tasks connected with Redis. This would make the GC scalable, and we could reuse the logic of the unique background task.

Originally posted by @matusdrobuliak66 in #6579 (comment)