Fix rdb read replica import

[remyleone]

terraform {
  required_providers {
    scaleway = {
      source = "scaleway/scaleway"
    }
  }
  required_version = ">= 0.13"
}

# scaleway_rdb_acl
# scaleway_rdb_privilege
# scaleway_rdb_read_replica
# scaleway_rdb_user

import {
  id = "fr-par/d50fd52c-cdbb-4fd6-b066-e04f9ae04e1c"
  to = scaleway_rdb_read_replica.foobar
}

terraform plan -generate-config-out=generated.tf

resource "scaleway_rdb_read_replica" "foobar" {
  instance_id = null # TO FILL (probably a good idea to ask the product team to return it in the response)
  region      = "fr-par"
  same_zone   = true
  direct_access {
  }

# We are missing endpoints information as well.
}

[Mia-Cross]

We are currently waiting for a way to fetch the instance ID from the read replica.