[Enhancement] PPL Alerting: active alerts searches don't paginate/scroll

[toepkerd]

Is your feature request related to a problem?
In PPL Alerting's current alerts expiration and postIndex/postDelete logic, when searching the active alerts v2 index for alerts to be moved or expired, a search call with size = 10000 is run. This capped search does not cleanly handle the case that there are more than 10000 alerts that need expiring or moving.

What solution would you like?
Search calls should scroll or otherwise account for pagination when searching active alerts index. This can be done with some kind of a BulkByScroll request. This way, all alerts that need to be expired, moved, or deleted in that given interval, are.

[andrross]

Catch All Triage - 1 2 3