Debug logging multiple issues in cosim mode

[filipdoai]

When running cosim simulation and enabling pytest debugging messages pygears has multiple issues

• To reproduce:

• have the cosim enabled
• run pytest with "--log-cli-level=DEBUG" option

• issues

1. libs "astpretty" and "networkx" not installed by default by pygears -> as a workaround should be installed manually
2. the simulation blocks and never finishes