Problem: AtoM DIP upload configuration sections are outdated

[replaceafill]

Version of the documentation

Archivematica 1.15.*

Page (and section, if applicable) where the issue occurs

• https://www.archivematica.org/en/docs/archivematica-1.15/admin-manual/installation-setup/integrations/atom-setup/#configure-dip-upload
• https://www.archivematica.org/en/docs/archivematica-1.15/admin-manual/installation-setup/customization/dashboard-config/#atom-server-configuration

Description of the issue

• They mention configuration files and packages that might not be necessary to set up or have been removed in recent versions of AtoM and Ubuntu such as rssh.
• Some links reference AtoM 2.1.

Suggested fix

Update and test the sections to work with AtoM 2.8.x

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For Artefactual use:

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