Add IP Location APIs (#3107)

* Add IP Location APIs

* Rename these files

* Reword this description

* Handle ipinfo in addition to maxmind

* A slightly more faithful alternative approach

* Remove accidentally-added line

* A more-correct implementation of the second approach

* Another approach using @Variants container

* Fix IP location APIs

* Update specification/ingest/get_ip_location_database/GetIpLocationDatabaseResponse.ts

Co-authored-by: Laura Trotta <153528055+l-trotta@users.noreply.github.com>

* Update specification/ingest/get_ip_location_database/GetIpLocationDatabaseResponse.ts

Co-authored-by: Quentin Pradet <quentin.pradet@elastic.co>

* Fix an import

and then make generate, etc

* Remove unused import

---------

Co-authored-by: Joe Gallo <joegallo@gmail.com>
Co-authored-by: Laura Trotta <153528055+l-trotta@users.noreply.github.com>
(cherry picked from commit dae081f)