boot: detect error message in final phase

This commit adds error message detection in the final bootloader-commands action.

Closes: #308
15 jobs for detect-final-error in 18 minutes and 44 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
passed #85998
amd64
dispatcher-debian-10

00:03:45

passed #86000
amd64
dispatcher-debian-11

00:04:56

passed #85999
amd64
server-debian-10

00:04:39

passed #86001
amd64
server-debian-11

00:06:42

 
  Analyze
passed #86003
amd64
black

00:00:35

passed #86004
amd64
code_quality

00:00:23

passed #86005
amd64
coverage

00:06:44

57.45%
passed #86006
amd64
dockerfiles

00:00:21

passed #86007
amd64
job-schema

00:00:27

passed #86008
amd64
pylint

00:01:50

passed #86002
amd64-dind allowed to fail
sast

00:02:22

 
  Build
passed #86010
amd64
debian/10

00:01:17

passed #86009
amd64
doc

00:00:48

passed #86011
amd64-dind
docker-amd64-dispatcher

00:04:56

passed #86012
amd64-dind
docker-amd64-server

00:05:15