Ship Ubuntu 24.04 + mainline kernel to master

Now that the initial 24.04 work is done, two hard parts remain: mainlining the kernel and doing the validation to get both shipped to master.

`test_onroad` is a good litmus test for functionality while developing. Once it's in a state where the test passes reliably on a single device, I can deploy it to to several devices in our internal testing closet.

Locked to @andiradulescu, who did the initial 24.04 work.

Bounty is split into two parts:
- [x] Get 24.04 shipped to master ($1k)
- [ ] Get mainline kernel shipped to master ($2k)