Figure out a way to share code with https://github.com/flatcar/mantle

[travier]

Feature Request

Platform support implementation is duplicated between this repo and https://github.com/flatcar/mantle.

Ideally, we should figure out a way to share code with https://github.com/flatcar/mantle so that we both benefit from it and avoid duplication.

Desired Feature

Example Usage

Other Information

[tormath1]

Some additional context here: https://github.com/coreos/coreos-assembler/issues/2741