The systemd timer created for health checks did not pass global
podman flags to the subprocess, causing it to use default storage
settings instead of matching the parent process. This is most
visible with --transient-store, where the healthcheck looks up
the container in the default store instead of the volatile one.
Extract GlobalPodmanArgs() from CreateExitCommandArgs so both the
exit command and healthcheck timer share the same set of global
flags (--root, --runroot, --transient-store, --storage-driver, etc.).
Fixes: https://github.com/containers/podman/issues/28483
Signed-off-by: Jan Rodák <hony.com@seznam.cz>
9598b30ac2