Adds initial support for building Hedgehog RPI images

[aut0exec]

🗣 Description

Initial support for creating an RPI Hedgehog image.

💭 Motivation and context

There was a request for this functionality and an open issue tracked on the INL Malcolm repo.

Raspberry Pi's are cheap and readily available these days and resources on the RPI 4 8GB are likely sufficient to support running a Hedgehog sensor. The Debian process used to build base Debian RPI images was used and then the necessary additions to build Debian into Hedgehog were added/installed via a chroot.

Raspberry Pi, Hedghehog ARM sensor

🧪 Testing

Full builds were done and tested on a RPI 4 8GB model. An actual RPI 4 sensor was setup and connected to a Malcolm instance via the guide here. No further testing beyond the E2E guide has been performed thus far. More testing recommended to ensure that the RPI image contains all the necessary configurations to function properly in a production setup.

✅ Pre-approval checklist

• [✅ ] This PR has an informative and human-readable title.
• [ ✅ ] All future TODOs are captured in issues, which are referenced in code comments.
• [ ✅] All relevant type-of-change labels have been added.
• [✅ ] I have read the CONTRIBUTING document.
• [ ✅] These code changes follow cisagov code standards.
• [ ✅] All relevant repo and/or project documentation has been updated to reflect the changes in this PR.

✅ Pre-merge checklist

• [ ] Revert dependencies to default branches.
• [ ] Finalize version.

✅ Post-merge checklist

[mmguero]

I've pulled the commit(s) from this branch into my development fork, when it's included in the next Malcolm release I'll come back here and close this PR.

[aut0exec]

Added a fix for the console not displaying UTF-8 properly and ensure that the sd-card is re-partitioned on first boot of the pi.

[mmguero]

Thanks I've pulled your update into my release testing branch and will test it out first thing Monday.

[mmguero]

commits included in and superceded by #297