add a check that sub-man release is not set or set to a major version

[evgeni]

No description provided.

[stejskalleos]

🍏 LGTM

Code is covered by tests & packit verification passed as well:

foreman-maintain health list | grep release
[check-subscription-manager-release] Check if subscription-manager release is not set to a minor version

Release not set

subscription-manager release --show
Release not set

foreman-maintain health check --label check-subscription-manager-release
Running ForemanMaintain::Scenario::FilteredScenario
================================================================================
Check if subscription-manager release is not set to a minor version:  [OK]
--------------------------------------------------------------------------------

Release set to 9

subscription-manager release --set 9
Release set to: 9

foreman-maintain health check --label check-subscription-manager-release
Running ForemanMaintain::Scenario::FilteredScenario
================================================================================
Check if subscription-manager release is not set to a minor version:  [OK]
--------------------------------------------------------------------------------

Release set to 9.6

subscription-manager release --set 9.6
Release set to: 9.6

foreman-maintain health check --label check-subscription-manager-release
Running ForemanMaintain::Scenario::FilteredScenario
================================================================================
Check if subscription-manager release is not set to a minor version:  [FAIL]
Your system is configured to use RHEL 9.6, but Satellite is only supported on the latest RHEL. Please unset the release in subscription-manager by calling `subscription-manager release --unset`.
--------------------------------------------------------------------------------
Scenario [ForemanMaintain::Scenario::FilteredScenario] failed.

The following steps ended up in failing state:

  [check-subscription-manager-release]

Resolve the failed steps and rerun the command.

If the situation persists and, you are unclear what to do next,
contact Red Hat Technical Support.

In case the failures are false positives, use
--whitelist="check-subscription-manager-release"