Foreman Maintain

Fixes #21589 - confine sync plans procedure to katello feature

Update the satellite upgrade to new code

Move sync-plans checks to pre/post migrations

Added spinner to enable sync_plans

Fixes #19 - Handled sync plans before & after upgrade

With this commit, below changes included -
1. Two new checks
- Disable sync plans before upgrade
- Enable sync plans after upgrade which are disabled previously.

2. Created directory lib/foreman_maintain/storage in which...