Add a bullseye based container that can be used instead of
debian-buster-jenkins-arm. The master-builds jenkins jobs will attempt
to use this jenkins job for the arm builds after setting the main
default image from debian-buster-jenkins to debian-bullseye-jenkins.
Related: OS#5949
Change-Id: I8e1741f86ffb8abd658d1e4e0415dfd11fb1a8a1
