Document AI usage data collection setting SaaS

Fred de Gierrequested to merge
587976-opt-in-setting-for-ai-interactions-data-collection-saas-docs into master

What does this MR do and why?

This MR adds the documentation for enabling AI usage data collection in a group. Follow-up from !223039 (comment 3083613057)

References

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Before After

How to set up and validate locally

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Related to #587976 (closed)

Edited by Fred de Gier

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