Catch-up release documentation - @gmmorris

[mikecote]

Go over previous PRs that have been merged since Alerting GA to document anything that requires it.

List of PRs created by @gmmorris requiring docs:
https://github.com/elastic/kibana/pulls?q=is%3Apr+label%3A%22Team%3AAlerting+Services%22+label%3Aneeds_docs+is%3Aclosed+author%3Agmmorris

[elasticmachine]

Pinging @elastic/kibana-alerting-services (Team:Alerting Services)

[gmmorris]

In the end docs were missing for only two PRs:

1. Added a new commit to the Scaling Docs to address the missing docs in [Alerting] Shift polling interval by random amount when Task Manager experiences consistent claim version conflicts #88020
2. [Docs][Alerting] updates images in Alerts Management and adds docs for the Run When field #92225

[mikecote]

@gmmorris looks like the PRs are merged now. Is there any further ones to review?

[mikecote]

I'll assume everything is merged and move this to Done.