[Actionable Observability] Add infrastructure fields to search schema for alerts table

[formgeist]

Summary

When I want to filter down the alerts list by e.g. service.name, that's entirely possible today. But if I try and do the same for host.hostname, then I get an error. It appears that the fields for rules are not added to the KQL search schema in the alerts table to support filtering the alerts table by e.g. conditions in the rules.

[elasticmachine]

Pinging @elastic/actionable-observability (Team: Actionable Observability)

[maryam-saeidi]

Update:
It seems the issue is not about missing some fields in the query section but rather not having that information in our data. Currently, we are working on enriching the data, so after that work is done, we should have these fields as well.
Here the related work can be tracked: https://github.com/elastic/actionable-observability/issues/7

[benakansara]

@formgeist I am working on PR #140598 that will make Infrastructure ECS fields available to search in Alerts table.

[formgeist]

@benakansara Thanks for the update 👍

[benakansara]

Closed by #140598