UX copy request for Detection rule workflows - Revert a customized prebuilt rule

[ARWNightingale]

Background:

Currently once user customizes the prebuilt rule, they cannot easily revert the changes they made to the Elastic version. We should provide them with a way to go back to the stock version of the rule.
Consider providing the base version preview, so that user can see it before reverting their changes.
Consider situation when the base version is missing.

To help users understand what changes were made to the prebuilt Elastic rule, we want to indicate that field was customised, and allow to see the previous field version.

Target release(s)

8.19, 9.1, and Serverless TBD

Epics

elastic/kibana#215506
elastic/kibana#207172

Designs
Design File

The Requests

We need to tell the user in a tooltip what the icon means next to each modified field in the rules details page. Heres my attempt We need to explain in a tooltip when reverting is disabled and why: this is because we do not have the Elastic version it was modified from as we only keep the latest 4 versions on a rule. So it may not have been updated in a while. We should suggest updating the rule instead. This is my attempt at the flyout language. Can you check it all makes sense for example the header and the use of Elastic version? We need a success message to confirm the success of reverting the rule back to the elastic version.

[nastasha-solomon]

Note to self: refer to Slack thread for prioritization and release details.

[nastasha-solomon]

@ARWNightingale I left some comments in the Figma for your review.

[banderror]

We're close to fully completing elastic/kibana#215506 - if there's anything left to do as part of this ticket, please reopen.