Changes

jenkins-common: use debian 13 by default

The testsuites were still using debian 12, switch to the current stable
version (13).

This also gives us a much newer bpftrace version:
* Debian 12: 0.17.0-1
* Debian 13: 0.23.2-1

Change-Id: I231e1e93724faf6d659132be9b9d0e164502bf95

debian-trixie-obs-latest: new container

Switching to debian 13 by default requires this new container for all
the -latest jobs that are still docker-playground based.

Fixes: 82bee6c4 ("jenkins-common: use debian 13 by default")
Change-Id: Id78e445ff93dbe63751f4579a52f122d524e0003

ttcn3-bts-test: add --no-warnings to bpftrace

Since switching to debian 13 and having bpftrace 0.23.2 instead of
0.17.0, bpftrace is constantly printing warnings. Turn off warnings by
default so we don't end up filling up the disk space of jenkins runners
while ttcn3-bts-test runs for >2h.

We can turn on warnings in copies of the main jenkins job for
development, while also ensuring that we only run a few tests instead of
the whole testsuite.

Warnings look like this:

  root@deb12build-ansible:/home/osmocom-build/jenkins/workspace/ttcn3-bts-test/logs/bts/bpftrace# head udp_sendmsg_delay.log
  [Thu Jan 15 01:31:13 UTC 2026] respawn: 0: starting: /data/bpftrace/udp_sendmsg_delay.sh
  + pidof osmo-bts-trx
  + bpftrace /data/bpftrace/udp_sendmsg_delay.bt -p 9
  Attaching 3 probes...
  Tracing udp_sendmsg() latency... Hit Ctrl-C to end.
  /data/bpftrace/udp_sendmsg_delay.bt:29:3-13: WARNING: Invalid argument
  Additional Info - helper: get_ns_current_pid_tgid, retcode: -22
    @start[tid] = nsecs;
    ~~~~~~~~~~
  /data/bpftrace/udp_sendmsg_delay.bt:30:3-13: WARNING: Invalid argument

Change-Id: I0e4c62f27f67d4b8601516ce5c1ebfa415331b4a