Consistency. Reordered clients in clients-debian file.

[0rnela]

Description

We have started listing supported clients in descending order (already in the support matrix) and some of the individual clients' registration files.
This is the continuation of that effort to ensure consistency.

Possible minor tidying up added as well.

Target branches

• Which documentation version does this PR apply to?
• Does this content need to be backported? If this is the case, create an issue for tracking it and add the link to this PR.
• Whenever possible, cross-reference each backport PR here, so that all backports can be easily accessed from the description.

• master
• manager-4.3

Links

• This PR tracks issue #<insert spacewalk issue, if any>
• Related development PR #<insert PR link, if any>