5.1 - Clarify the instruction where they need to run.

[0rnela]

Description

It wasn't clear if commands were supposed to run from container or host os. This PR helps clarifying that.

Target branches

• Which product version this PR applies to (Uyuni, MLM-5.1 and 5.0). This information can be helpful if ifeval statements are needed to publish it for certain products only.
• Does this PR need to be backported? If yes, 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.

Backport targets (edit as needed):

• master Clarify where the commands needs to run #4468
• 5.1
• 5.0 5.0 - Clarify the instruction where they need to run. #4472

Links

• This PR tracks issue https://github.com/SUSE/spacewalk/issues/28751
• Related development PR #<insert PR link, if any>