Provide a "Graylog Schema" Index Set Field Type Profiles as an out of box profile

## What?

Using the new "Index Set Field Type Profiles" feature, add an out of box profile that adheres to the [Graylog Schema](https://schema.graylog.org/).

## Why?

Configuring explicit field types is beneficial to avoid dynamic mapping incorrectly guessing a field type based on the first message in the index with that field. For example a field that should store strings may be incorrectly typed as an integer (or vice versa). Some types are also not possible via dynamic mappings, such as the `ip` type.

For this reason, providing users with a suggested default mapping that they can apply as they choose, can be very helpful, both for Graylog Open users and also paying customers alike.