[Docs]: Decommissioning plan for Barman Cloud updated to 1.30 #10125

Is there an existing issue already for your request/idea?

• I have searched for an existing issue, and could not find anything. I believe this is a new documentation enhancement to be evaluated.

What problem in the existing documentation this issue aims to solve?

Currently we mention that native Barman cloud support will be removed in 1.29. This needs to be updated to 1.30.

Describe what additions need to be done to the documentation

N/A

Describe what pages need to change in the documentation, if any

• internal/webhook/v1/cluster_webhook.go
• https://cloudnative-pg.io/docs/1.28/appendixes/backup_barmanobjectstore

Describe what pages need to be removed from the documentation, if any

No response

Additional context

No response

Backport?

No

Code of Conduct

• I agree to follow this project's Code of Conduct