Creating networks with the CLI does not create a default firewall rule for it

[fernando-villalba]

Issue

The default network has a default firewall that cannot be deleted.

When creating another network in the UI, it also creates a default firewall that also cannot be deleted.

Creating a network in the CLI however does not create this default firewall.

This issue also affects the Terraform provider.

Acceptance criteria

• Ensure the behaviour of the CLI matches that of the UI. When a network is created, a default firewall should also be created.

[haardikdharma10]

Closing as completed in #431