uuu_scripts: Add scripts to boot a specified kernel version from /boot partition

This allows easy switching between installed kernel packages.
3 jobs for boot-kernel-ver in 8 minutes and 23 seconds (queued for 8 seconds)
Status Job ID Name Coverage
  Build
passed #259567
librem5
build:deb

00:02:52

 
  Test
passed #259568
librem5
test:download:deb

00:02:23

passed #259569
librem5
test:download:pip

00:03:07