Dev/thekrauss/cloud instances with multiple network

[thekrauss]

Description

This PR addresses issue #1115 by enabling the attachment of multiple private network interfaces to a Public Cloud instance.

Previously, the provider limited the network.private block to a single item (MaxItems: 1). This change allows users to define multiple private blocks to connect an instance to multiple vRacks/Subnets simultaneously (e.g., Front/Back architecture).

Type of change

• Schema: Changed network.private from TypeSet to TypeList to ensure interface ordering (eth1, eth2...) is respected and removed the MaxItems: 1 restriction.

• Structures: Updated Network struct to handle a slice of private networks ([]*PrivateNetwork) instead of a single pointer.

• Logic: Updated GetNetwork helper to iterate over all defined private blocks and construct the correct payload for the API

resource "ovh_cloud_project_instance" "multinic_instance" {
  service_name   = "XXX"
  region         = "GRA11"
  name           = "multi-nic-instance"
  flavor_id      = "UUID"
  image_id       = "UUID"

  network {
    public = true

    private {
      network {
        id        = private.net_front.id
        subnet_id = subnet.subnet_front.id
      }
      ip = "10.0.1.10"
    }

    private {
      network {
        id        = private.net_back.id
        subnet_id = subnet.subnet_back.id
      }
    }
  }
}