Update enabled software channels number

[maximenoel8]

What does this PR change?

Update enabled software channel. We need a description of the expected channels in the future.

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• No tests: already covered

• DONE

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[nodeg]

LGTM. Thank you. We have a card in our inbox for refactoring this and always have the correct channels selected. See https://github.com/SUSE/spacewalk/issues/22701

[srbarrios]

This fix the red indeed.
But that's what we really want?

If a user runs this test manually, it will see one less channel subscribed on the WebUI, therefore this value is missleading.

In my opinion, instead (or in addition) of running a zypper command to retrieve the enabled repos, we want to retrieve from the WebUI or the API the amount of subscribed channels (or even better, check one by one that all the channels we expect are subscribed).

So, approving, but please add a TODO comment with the card for the refactor so we keep that in mind im the future.

[deneb-alpha]

checked with @nodeg and @srbarrios and decided to merge

[srbarrios]

Please @maximenoel8 , on this PR changes it was not considered my comment:

So, approving, but please add a TODO comment with the [card](https://github.com/SUSE/spacewalk/issues/22908) for the refactor so we keep that in mind in the future.

Could you add the TODO to be sure we will take care about this?