Add URL parts to url decode processor

[leehinman]

It would be nice if the url decode processor was able to populate a target field with the parts of the URL. This would make it much easier to populate things like host & port information when you have a url to work with

https://docs.oracle.com/javase/tutorial/networking/urls/urlInfo.html

[andrewkroh]

For reference, these are the fields that ECS splits a URL into: https://www.elastic.co/guide/en/ecs/current/ecs-url.html.

[elasticmachine]

Pinging @elastic/es-core-features (:Core/Features/Ingest)