remove unsupported archs

[jafiala]

What changes are you introducing?

Remove unsupported architectures from Satellite docs

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

They are not supported

Anything else to add? (Considerations, potential downsides, alternative solutions you have explored, etc.)

https://issues.redhat.com/browse/SAT-41336

Contributor checklists

• I am okay with my commits getting squashed when you merge this PR.
• I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

• [] Foreman 3.17/Katello 4.19
• Foreman 3.16/Katello 4.18 (Satellite 6.18; orcharhino 7.6)
• Foreman 3.15/Katello 4.17
• Foreman 3.14/Katello 4.16 (Satellite 6.17; orcharhino 7.4; orcharhino 7.5)
• Foreman 3.13/Katello 4.15 (EL9 only)
• Foreman 3.12/Katello 4.14 (Satellite 6.16; orcharhino 7.2 on EL9 only; orcharhino 7.3)
• We do not accept PRs for Foreman older than 3.12.

[github-actions]

The PR preview for 601aa00 is available at theforeman-foreman-documentation-preview-pr-4563.surge.sh

The following output files are affected by this PR:

• Provisioning_Hosts/index-foremanctl-satellite.html
• Provisioning_Hosts/index-satellite.html

show diff

show diff as HTML

[evgeni]

This still alters the "registration" list in the appendix: