Rewrite network resource ip section (replace addresses with address list)

[dmacvicar]

The current network resource schema prevents for some libvirt combinations to be declared. Given that most people using this resource are using it for testing, and they are indeed declaring some complex networks, the idea is to have a schema more close to the libvirt one eg. have a proper ip block with dhcp per address, mimicking the libvirt structure.

Plan

• Release it as resource_network_v2 ?
• Probably just follow libvirt as close as possible, but keep some sane defaults. Autodetecting network families comes to my mind

Related issues

• Allow defining DHCP ranges https://github.com/dmacvicar/terraform-provider-libvirt/issues/794

[tsweets]

I compiled the network_v2 branch and tried this out. I was able to define a DHCP range and then reserve an IP address outside of that range. My VM booted and got the IP address that I wanted. This all behaved like I would have expected.