Remove SecHub configuration from all REST end points of PDS

[de-jcup]

Situation

With #3266 there will be a dedicated REST endpoint to fetch masked SecHub configuration (as user of the project or as administrator).

It shall be the only possible way to fetch these information. But it could be possible the we provide the configuration at some existing PDS REST end points

ℹ️ This is a sub issue of #3250

Wanted

No REST endpoint at PDS shall provide the SecHub configuration

Solution

Check all REST end points if configuration is provided accidentally and remove the information there

[de-jcup]

There is no rest endpoint which returns sechub configuration or job configuration. So closing this issue