* Remove code that is in debian-bookworm-build already (all packages
that get installed, creating the build user, installing osmo-ci and
osmo-gsm-manuals).
* Put toolchain installations in single RUN commands, so the unextracted
tarballs are not stored in image layers.
Related: OS#6057
Change-Id: Iaaca6367b76a6ec860c63d57c767954f82edfee5
* Do not clone using deprecated git://, use https:// instead.
* Clone from the main repo gerrit.osmocom.org (if possible).
* Use the gitiles plugin to fetch the last commit from Gerrit.
Change-Id: I204fa6e3e3ebbdb8732393b897fca35659d61ae8
PATH isn't overwritten anymore when jenkins runs docker in osmo-ci.git's
master-builds.yml / gerrit-verifications.yml, therefore we can remove
this hack.
Change-Id: I5bff98f7af1a2f2de88c8d96d1e30de960057d01