Add support for AWS RDS
As requested in https://gitlab.com/gitlab-org/quality/gitlab-environment-toolkit/-/issues/74 adding in the ability to configure and use AWS RDS as the database for both GitLab and Praefect should be added to the Toolkit.
As requested in https://gitlab.com/gitlab-org/quality/gitlab-environment-toolkit/-/issues/74 adding in the ability to configure and use AWS RDS as the database for both GitLab and Praefect should be added to the Toolkit.