[Maps] Tracking Alert by Containment

[kmartastic]

Meta-issue: #35324

Customers can create an alert based on an object entering or leaving a geographic boundary. Both objects and boundaries will come from an existing index.

Minimum Requirements:

• Customers can get started from Management > Alerts and Actions > Create Alert
• There is a new alert type (Tracking or Boundary or Location threshold)
• Customers should be able to choose one or more objects and one or more boundaries within the condition statement of the alert

Possible stretch goals:
Create Alert from Maps app (User experience TBD)

Dev requirements:

Feature Branch maps-alerting

• Add logic to support containment & crossing conditions
• Add server-side support for maps alerts
• Add validation
• Add testing

[elasticmachine]

Pinging @elastic/kibana-gis (Team:Geo)