IP fields in Aggregations are sorted lexicographically instead of numerical

## Expected Behavior

IP fields in Aggregations should be sorted numerically.

## Current Behavior

IP fields are sorted lexicographically using the string representation.

## Possible Solution

The problem is linked to the fact that we're using scripted terms in aggregations which leads to the treatment of the IP type as a a string. This can only be solved by a different approach. So there is no ETA yet.

## Your Environment

* Graylog Version: 6.x
* Java Version:
* OpenSearch Version:
* MongoDB Version:
* Operating System:
* Browser version: