[RAC] Option to add a new connector in the create new case flyout in the Alerts Page

[mgiota]

📝 Summary

When a user selects to attach an alert to a new case from the alerts page, in the connector dropdown of the flyout there's no option to add a new connector. In the Cases page this option is there and opens a Flyout where user can add a new connector. It would look weird to open a flyout on an existing flyout, so if we want to give the option to the user to interact with the connectors within the Alerts page, we should investigate how this should be done in a user friendly way.

Enable RAC Observability

Here are the flags you need to enable in kibana.yml to be able to enable Alerts https://github.com/elastic/kibana/blob/master/x-pack/plugins/observability/README.md#rules-alerts-and-cases

Generate some test data

node scripts/es_archiver load x-pack/test/functional/es_archives/observability/alerts --kibana-url=http://elastic:changeme@localhost:5631/__UNSAFE_bypassBasePath --es-url=https://elastic:changeme@localhost:9200 --es-ca=node_modules/@kbn/dev-utils/certs/ca.crt

Once you get some data click on the overflow menu of an alert and from the options select Add to new Case. Flyout will open and you will be able to see the connectors dropdown.

✔️ Acceptance criteria

• Consider if we actually want to give the option to the user to interact with the connectors within the Alerts page @cyrille-leclerc @vinaychandrasekhar
• Investigate a user friendly workflow that will allow user to add a new connectors from Alerts page
• Take as an example the Alerts & Rules Flyout of Logs App

[elasticmachine]

Pinging @elastic/security-threat-hunting-cases (Team:Threat Hunting:Cases)

[cnasikas]

cc @monina-n @paulewing @asnehalb

[elasticmachine]

Pinging @elastic/response-ops-cases (Feature:Cases)

[elasticmachine]

Pinging @elastic/response-ops (Team:ResponseOps)