Test upgrades

[Ham22]

We need to test upgrades, there are lots of scenarios to test but atm anything is better than nothing.

Acceptance criteria:

• test that a build can upgrade the other nand partition to itself
• confirms a reboot does switch parititions

[nikhil-zinjurde-imgtec]

Duplicate of #4 ??

[Ham22]

Hmm didn't see that one but I think we could leave this one open as the first bit of just get anything working where as the other one is about testing to/from stable releases?