[Feature Request]: Put DHCP back in the default netplan for the server image

### Which feature would you like to have?

I think the default netplan for the full server image used to have DHCP true settings for both ipv4 and ipv6. In the 25.11 round of testing I found that the full server images no longer set up with DHCP. The minimal image still has DHCP setup in the default netplan. This results in the full server image providing a different ipv6 address than the minimal image. To make matters worse the full server image seems to set up with privacy extension true which provides a random ipv6 address, which is not suitable for a server.

I would like to have the default netplan for the server image to have ipv6 set to true and probably ipv4 also.

### Funding

- [ ] [I am willing to cover expenses](https://www.armbian.com/contact/)