fix zombienet test (#2719)

Remove old version for `cli_args`, since this was fixed in the latest
version of zombienet and the `latest` version of polkadot introduce the
new flag `--insecure-validator-i-know-what-i-do`.

Fix jobs like
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4726174
Thx!