Add possibility for separating CONFIG_OVERWRITE_JSON

[steled]

Hi,

as I'm using OIDC and put the configuration of it into core.configureUserSettings it would be great to be able to separate the content into a another secret so that I can encrypt the user settings.
See an example here: bitnami harbor - core.configOverwriteJsonSecret

What dou you think about that?

[steled]

I opened an issue for that topic: #1800