docs: kubernetes operations guide

[misba7]

Prepare

• Read PR guidelines
• Read license information

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Description

Target issue

closes #issue-number-here

Implementation Details

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Test and Document the changes

• Static code analysis has been run locally and issues have been fixed
• Relevant unit and integration tests have been added/updated
• Relevant documentation has been updated if any (i.e. user guides, installation and configuration guides, technical design docs etc)

[moabu]

• Please follow https://github.com/JanssenProject/jans/tree/main/docs/assets#guidelines and add the .draw.io file as well.
• fix the diagram by adding the Spanner and couchbase persistences to the persistence layer