Cellular Network Infrastructure

As OBS now has Debian_12 as distribution definition we can build against, I've enabled it for osmocom:nightly and osmocom:latest. It so far looks good, but builds are still running.

I've verified we don't need to build libnftnl + nftables anymore, as Debian 12 ships sufficiently new versions.

Initially, binutils-arm-osmo-eabi was built and failed, but this was a problem with the package configuration: It was set to all:yes and then disabled on 90% of all distributions, rather than being all:no and selectively only enabled on ancient ones. I've fixed that now.

pcengines:apu/gpio-nct5104d-dkms is fixed with: https://gitea.osmocom.org/osmith/linux-gpio-nct5104d/commit/3f0ff389b59ee1f8a5d795dc2591a86f87855906

https://gerrit.osmocom.org/q/topic:debian12

adjust fpga-build

https://gerrit.osmocom.org/c/docker-playground/+/34163

adjust release manuals job

https://gerrit.osmocom.org/c/osmo-ci/+/34052

adjust release tarballs job

https://gerrit.osmocom.org/c/osmo-ci/+/34160