Add the ability to define custom_fields

[florianschendel]

NetBox version

v4.x

Proposed functionality

Add the ability to define custom_fields in

netbox_available_prefix
netbox_available_ip_address
netbox_vlan

Similar to the custom_fields found in netbox_virtual_machine or netbox_ip_address resource.

custom_fields (Map of String)

or

custom_fields (Map of String)

Use case

Allows us to declare custom_fields attached to the netbox_ip_address resource.

End result

"custom_fields": {
    "record1": "test1,test2",
    "record2": null,
    "record3": false,
},

[alexandrud]

Somebody wanted this for netbox_device_interface #652