0.6.0 Use `terraform-terraform-label` instead of `terraform-null-label`

what

• Use terraform-terraform-label instead of terraform-null-label

why

The terraform-null-label grew a bit complex and is throwing errors when used:

* module.sc-api-env-active.module.elastic_beanstalk_environment.module.label.data.null_data_source.tags_as_list_of_maps: data.null_data_source.tags_as_list_of_maps: 
value of 'count' cannot be computed