Add abrak_uuid in arvan_iaas_abrak resource as a readonly parameter

[m-yosefpor]

Right now it's not possible to get instance uuid directly from arvan_iaas_abrak resource and we need to define a data block with depends_on which is cumbersome. There should be an option like what arvan_iaas_subnet has for network_uuid to be able to get abarak_uuid directly from resource block.

After this, in network attach we can easily do:

resource "arvan_iaas_network_attach" "sample" {
    abrak_uuid = arvan_iaas_abrak.something.abrak_uuid
    network_uuid = arvan_iaas_subnet.something.network_uuid
    region = var.region

}

instead of :

data "arvan_iaas_abrak" "get_abrak_id" {
  depends_on = [
    arvan_iaas_abrak.something
  ]

  region = var.region
  name   = "something"
}

resource "arvan_iaas_network_attach" "sample" {
    abrak_uuid = data.get_abrak_id.id
    network_uuid = arvan_iaas_subnet.internal.network_uuid
    region = var.region
}

[m-yosefpor]

Although abrak_uuid is different from resource.id, but it's possible to attach networks with resouce.id as well. I think examples in this repo can be simplified:

resource "arvan_iaas_network_attach" "sample" {
    abrak_uuid = data.get_abrak_id.id
    network_uuid = arvan_iaas_subnet.internal.id
    region = var.region
}

this works!