Add support for mac, floating, and zone properties of IpAddress

[vmj]

These properties seem to be available in UpCloudApi::ipAddresses response, and IpAddressApi::load response.

https://developers.upcloud.com/1.3/10-ip-addresses/#list-ip-addresses

https://developers.upcloud.com/1.3/10-ip-addresses/#get-ip-address-details

The mac and floating properties can be sent in UpCloudApi::create(IpAddress,...) payload.

https://developers.upcloud.com/1.3/10-ip-addresses/#assign-ip-address

The mac can be sent in IpAddressApi::update(IpAddress,...) payload.

https://developers.upcloud.com/1.3/10-ip-addresses/#modify-ip-address