Migrate Internal Database to bitnami sub-chart and registry1 image

Currently the default Database setting is an internal Database but it requires using the upstream docker image from harbor to be functional, similar to other BB packages like anchore/sonarqube/mattermost/keycloak pull in bitnami/charts postgresql chart as a sub-chart and ensure it's using registry1 images to deploy the default internal database.

• postgresql chart KPTd to chart/deps
• sub-chart conditionally enabled and alias defined
• Registry1 image overridden in sub-chart alias
• Successful deployment, green pipelines, happy harbor!