helm: changes to upstream bitnami charts (postgresql)

[tylerauerbeck]

Bitnami recently announced changes to their charts repository: bitnami/charts#35164

At the end of August, existing charts will be moved to a legacy repository and those that remain will be published to a new repository. Those in the new repository will only be available at a latest tag and will not be recommended for production release.

As the current chart makes use of the postgresql chart, it should be determined how to manage this dependency moving forward.

[tormath1]

Thanks for the heads-up. I am wondering if we could not simply and purely drop the bitnami dependency and ship a default postgres basic configuration enough for running Nebraska.