Feature/remove bollard (#2396)

* wip

* remove bollard, add podman feature

* fix error message parsing

* fix subcommand

* fix typo

* use com.docker.network.bridge.name for podman

* fix parse error

* handle podman network interface nuance

* add libyajl2

* use podman repos

* manually add criu

* do not manually require criu

* remove docker images during cleanup stage

* force removal

* increase img size

* Update startos-iso.yaml

* don't remove docker

backend/src/util/mod.rs

@@ -24,6 +24,7 @@ use tracing::instrument;
 use crate::shutdown::Shutdown;
 use crate::{Error, ErrorKind, ResultExt as _};
 pub mod config;
+pub mod docker;
 pub mod http_reader;
 pub mod io;
 pub mod logger;