Encrypt SecHub configuration in Database

[de-jcup]

Situation

Currently the user configuration is not encrypted.

With #837 we have now some security helper classes which provide a secure way to handle this.

:information_source: This is a sub issue of #3250

Wanted

We want user configuration data encrypted inside database. So user credentials inside configurations will be stored encrypted inside database

Solution

• [ ] Introduce new table to hold encryption data for cluster (use concept created in epic #3250 )
• [ ] Write migration sql flyway script - NONE encryption after migration
• Handle all parts with encryption in SecHub database:
  • [ ] Automatically update existing jobs which are done
  • [ ] Startup phase blocks when a server does not support encryption / sanity check fails
  • [ ] New jobs have automatically encrypted configuration