Description of problem:
Satellite 6.15 upgrade <packages-check-for-reboot> warning message shows Scenario [Checks after upgrading to Satellite 6.15.z] as failed.

Version-Release number of selected component (if applicable):
Satellite 6.15

How reproducible:
Try to upgrade the Satellite 6.15
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

1. satellite-maintain upgrade run --target-version 6.15.z
   --------------------------------------------------------------------------------
   Check if system needs reboot: [WARNING]
   Updating Subscription Management repositories.
   Core libraries or services have been updated since boot-up:

• kernel

Reboot is required to fully utilize these updates.
More information: https://access.redhat.com/solutions/27943
--------------------------------------------------------------------------------
Scenario [Checks after upgrading to Satellite 6.15.z] failed.

The following steps ended up in warning state:

[packages-check-for-reboot]

The steps in warning state itself might not mean there is an error,
but it should be reviewed to ensure the behavior is expected
--------------------------------------------------------------------------------
Upgrade finished.

1. reboot
2. satellite-maintain upgrade run --target-version 6.15.z
   --------------------------------------------------------------------------------
   Check if system needs reboot: [OK]
   Updating Subscription Management repositories.
   No core libraries or services have been updated since boot-up.
   Reboot should not be necessary.
   --------------------------------------------------------------------------------
   --------------------------------------------------------------------------------
   Upgrade finished.
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Actual results: Below message is confusing and need to re-run upgrade again:

~~~~
Scenario [Checks after upgrading to Satellite 6.15.z] failed.
~~~~

Expected results: Can we remove the below messages? we can --whitelist=packages-check-for-reboot, but it will also include additional efforts.

~~~~
Scenario [Checks after upgrading to Satellite 6.15.z] failed.

The following steps ended up in warning state:

[packages-check-for-reboot]

The steps in warning state itself might not mean there is an error,
but it should be reviewed to ensure the behavior is expected
~~~~~

Additional info: Also we have additional steps in doc to check reboot:

6. Determine if the system needs a reboot: # dnf needs-restarting --reboothint
7. If the previous command told you to reboot, then reboot the system: # reboot