Title: #5766: [WiP] Sources cleanup - part 3.
Sorry I didn't indicate this is work-in-progress yet.
Remaining steps here are:
- incorporate "lib secrets" into KCM since there are no other users
- to check if `kcm_ops_queue*` layer is still needed (most probably answer is
"no" because only sync backends are now available) and remove if not
- get rid of encrypted/JSON payload support in KCM
Then "lib secrets" can drop support of encrypted payload, and probably utils
crypto can drop some helpers, etc, but I didn't check it yet.
See the full comment at https://github.com/SSSD/sssd/pull/5766#issuecomment-908192570