Update ECK documentation for rotating credentials.

[naemono]

Question

• Do we want to also document how to rotate the Kibana encryption keys?

Related: elastic/cloud-on-k8s#8839

[Copilot]

Pull Request Overview

Updates ECK documentation to improve the credential rotation process by preventing accidental deletion of Kibana encryption keys. The change refines the kubectl command to exclude Kibana secrets and adds a warning note about previous documentation.

• Modified kubectl command to exclude Kibana secrets when rotating credentials
• Added explanatory note about why Kibana config secrets should not be deleted

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[github-actions]

🔍 Preview links for changed docs

• deploy-manage/users-roles/cluster-or-deployment-auth/managed-credentials-eck.md

[shainaraskas]

approved with a suggestion

[pebrc]

This will no longer be true since ECK 3.2. We are automatically excluding the Kibana form the credentials label.

[pebrc]

We should qualify this statement to be true up to version 3.2.

@shainaraskas do you have a recommendation how we should best include instructions that only pertain to older versions of the software, without cluttering the whole docs page with exceptions?

[shainaraskas]

I'd suggest:

• use an applies switch and put your code snippets in there. one tab for 3.0 and one for 3.2 - put your 3.2 tab first.

• in your note, just preface it with 'In ECK versions 3.1 and earlier ...' 'In ECK versions prior to 3.2 ...'