[Internal]: [ResponseOps] New Cases Analytics Index external docs

[tiamliu]

Description

what: Exploring Cases data in Dashboard and Discover is now supported.
when : 9.1/8.19
why: The new Cases analytics index can be used to build dashboards and visualizations of Cases activities /trends. These data points offer improved visibility on incident management efficiency in Kibana for operation managers.

Resources

https://github.com/elastic/response-ops-team/issues/191

Which documentation set does this change impact?

Elastic On-Prem and Cloud (all)

Feature differences

Same

What release is this request related to?

9.1

Serverless release

9.1

Collaboration model

The documentation team

Point of contact.

Main contact: @adcoelho @cnasikas @tiamliu

Stakeholders: @paulewing

[nastasha-solomon]

Removing from sprint since it was removed from the 8.19/9.1 and Serverless releases.