[ENH] - Backup and restore user profiles

[pt247]

Feature description

We want to add the ability to back up Nebari's KeyCloak store.

Interface

nebari backup user-creds --backup-location <BACKUP_LOCATION>

nebari restore user-creds --backup-location <BACKUP_LOCATION>

Location

The backup will be stored in the following format:
<BACKUP LOCATION>/<YYYY-MM-DD:HH:mm:ss>/NFS/user_data/

Implementation

We can do backup in one of 2 ways:

1. Take a snapshot of entire database.
2. Backup keycloak https://www.keycloak.org/server/importExport

We should do option 2, as backing up KeyClok would be the same regardless of the database used by KeyCloak.

Value and/or benefit

1. Will allow us to do backups before new deploys.
2. Will save the state from accidental deletes.

Anything else?

No response

[pt247]

Keycloak backup and restore are implemented by the user. We can use that.

[pt247]

Closing in favor of #2518