Farmer support for network interface

[Huaxinli123]

This PR closes #

The changes in this PR are as follows:

• Adding support for azure network interface
• Support both dynamic and static ip allocation

I have read the contributing guidelines and have completed the following:

• Tested my code end-to-end against a live Azure subscription.
• Updated the documentation in the docs folder for the affected changes.
• Written unit tests against the modified code that I have made.
• Updated the release notes with a new entry for this PR.
• Checked the coding standards outlined in the contributions guide and ensured my code adheres to them.

If I haven't completed any of the tasks above, I include the reasons why here:

Below is a minimal example configuration that includes the new features, which can be used to deploy to Azure:

#r "nuget:Farmer"
open Farmer
open Farmer.Builders
open Farmer.Builders.NetworkInterface

arm {
    location Location.EastUS
    add_resources
        [
            vnet {
                name "test-vnet"
                add_address_spaces [ "10.0.0.0/16" ]
            }
            networkInterface {
                name "my-network-interface"
                subnet_prefix "10.0.100.0/24"
                link_to_vnet (virtualNetworks.resourceId "test-vnet")
                add_static_ip "10.0.100.10"
                accelerated_networking_flag false
                ip_forwarding_flag false
            }
        ]
}

[ninjarobot]

@Huaxinli123 thanks again for this PR. The code, tests, and docs look good, just have a few questions about the functionality.

[ninjarobot]

@Huaxinli123 can you please resolve the conflicts in the network tests since merging your prior PR?

[ninjarobot]

Thanks for addressing those. Once the merge conflicts are resolved, this is ready to merge.