2e: Adopt to new DTBO generation method

Description

This MR resolves the linked issue

Issue(s)

• https://gitlab.e.foundation/e/devices/backlog/-/issues/133

Test environment

Generate a new build with this MR

Test procedures

• Ensure the build generates without any issues
• Flash the build and notice it now shows log for every partition which is being flashed
• Boot the system and notice it boots without any issues

Technical details

None available

Screenshots

None available

Check list

• Self-review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update