[SLO] Improve rollback granularity on create/update SLO services

[kdelemme]

Problem

The current rollback mechanism attempt at reverting all possible operations. Problem happens during the rollback when the user does not have sufficient permission to do the operation, which was the same reason the rollback was triggered in the first place, e.g. no permission to create a transform.

We should rollback only operations that have happened successfully.