[Feature]: add data_source for equinix_network_acl_template

[Fuxbert]

Description

API endpoint offers a GET to retrieve all or specific NACL ids, this is currently not supported in Terraform provider without a workaround via data.equinix_network_device
Creating this data_source would align TF provider and API usability

New or Affected Terraform Resources

data.equinix_network_acl_template (new)

Potential Terraform Configuration

data "equinix_network_acl_template" "here" {
  name = <queried_nacl_name>
  }
output "nacl_id" {
  value = data.equinix_network_acl_template.here.id
  }