RDoc-2530 added the Kafka ETL API and Studio pages "setup workflow" and "prerequisites for a secure Kafka server" sections

[reebhub]

Issue link

RDoc-2530

Additional description

• Added the Kafka ETL API and Studio pages a "setup workflow" and a "prerequisites for a secure Kafka server" sections, explaining the setup routes when the Kafka cluster does or doesn't use ACL.
• Note a difference between the Studio page of v7.2 and others: in v7.2 it is explained how to extract task scripts transactional IDs from the ongoing tasks view, and from older versions how to extract it from exception messages.

Type of change

• Content - docs
• Content - cloud
• Content - guides
• Content - start pages/other
• New docs feature (consider updating /templates or readme)
• Bug fix
• Optimization
• Other

Changes in docs URLs

• No changes in docs URLs
• Articles are restructured, URLs will change, mapping is required (update /scripts/redirects.json file, set Documents Moved PR label)

Changes in UX/UI

• No changes in UX/UI
• Changes in UX/UI (include screenshots and description)