Calling 'podman system cleanup' causes problems with containers/images
in a separate Podman root. Despite being stored elsewhere, they are
still under Podman's influence and the cleanup removes them. Also,
running containers (outside the scope of the tests) still got affected
by this call and e.g., lost the ability to follow terminal size changes.
Despite the raised concerns, to ensure proper cleanup of any Podman
state, the reset still needs to be done. Thus, do it only once during
the test suite teardown, moving the potential source of problems to a
single position..
https://github.com/containers/toolbox/pull/1024
813f971181