Foreman Maintain

Fixes #20974 - procedures for Katello-Service stop and start

Fixes #20847 - Unify steps description

Fixes #20641 - clean the upgrade storage on upgrade finish

Fixes #20625 - Add 'upgrade scneario'

• 6.2 -> 6.2.z
• 6.2 -> 6.3
• 6.3 -> 6.3.z

Run installer

Configure repositories and update packages

Update the satellite upgrade to new code

Extract control flow of upgrades to special file

Move sync-plans checks to pre/post migrations

Introduce run_strategy for scenarios

Health-check scenarios are better to run all steps regardless of errors
(:fail_slow strategy), while the migration scenarios should fail as soon
as first failure happens (:fail_fast strategy).

By default, the scenarios are treated as `:fail_fast`.