* Move label templates into `common` role
So that there is single source of labels management, and labels are
unified across the other roles
* Introduce `additional_labels`
* Fix paths for labels templates
* Return `additional_labels_items` as list
* Add molecule tests
- renamed some more variables to be consistent with the pulp-operator
- removed unneeded vars from backup & restore crds
- added a way to parse spec at restore time by including vars to
get around the issue of triply nested quotes when using to_json
- set migrate data status even if custom name for old postgres config is not used
- Allow users to change pg name, pw & db name for a managed postgres
- set default value for postgres-configuration type as unmanaged if secret is created
- Make pg port configurable for managed deployments
