Description

This PR updates the documentation related to performing backups and restoring them for self managed as a result EPIC camunda/camunda#24456.

Backups for webapps can now be performed by any webapps (operate, tasklist or optimize) and there is no need anymore to perform one for each app.

The order of the operations has also changed (source: decision document):
1 - Soft Pause on Zeebe to export - POST actuator/exporting/pause?soft=true
2 - SaaS Controller triggers WebApps and monitor it together
3 - Backup Zeebe ES Records
4 - Backup Zeebe Data
5 - Resume exporting

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.