Migrate Alerting plugins (including Task Manager and Event Log) to TS project references

[YulNaumenko]

Summary

Now that the Kibana build system supports using TypeScript project references (#46773), the infra plugin must be migrated to participate. This is part of the overall effort tracked at #80508.

Plugins to migrate:

• alerts
• actions
• event_log
• task_manager
• triggers_actions_ui
• stack_alerts

Blockers

Plugin dependencies blocking full migration:
task_manager depends on migration of the following first:
apm (#81003)

event_log depends on migration of the following first:
home

actions and alerts plugins depends on migration of the following first:
security_oss
home

Acceptance criteria

Each of the listed plugins can be referred to using a project reference, which means it...

• has a tsconfig.json file which conforms to the documented form
• references the dependencies
• emits type definitions for its public API
• compiles in tsc's build mode

Related information

• https://github.com/elastic/kibana/blob/master/docs/developer/best-practices/typescript.asciidoc#project-references
• https://www.typescriptlang.org/docs/handbook/project-references.html

[elasticmachine]

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

[smith]

Plugin dependencies blocking full migration:
task_manager depends on migration of the following first:
apm (#81003)

This was fixed in #83081 and is no longer a blocker.

[YulNaumenko]

event_log migration still blocked by migrating of spaces plugin.