Changes

ansible: podman: use fuse-overlayfs

The default driver "vfs" leads to container crashes on heavy i/o load
on our jenkins machines. Use "fuse-overlayfs" instead, which does not
have these problems.

Add a systemd service that creates /dev/fuse when the LXC container
starts and configure the driver via ~/.config/containers/storage.conf.

Note: when changing the storage driver, the previous storage database
needs to be removed (~/.local/share/containers/storage/). I've done
this manually before rolling out this change.

Fixes: OS#6524
Change-Id: Ib67d5cbc7d567efed673e2e646ae5b903c49e928

jobs/ttcn3-testsuites-testenv: add s1gw

Remove the docker-playground based job and add a new testenv based job
instead. Add one for -latest too as we recently tagged the first
releases.

Do not limit the job to a specific node, looks like this was pasted
from the above job by mistake. I've successfully ran this on another
node build2-deb11build-ansible.

Related: OS#6494
Depends: osmo-ttcn3-hacks Ib66c3f23355c117302b48fc9ef05cde1920d8739
Change-Id: Iac626d0c7c87c49ee6ba540ae1894abdb2336642