Make integrations review process better

So apparently there seems to be a separate system if people want to develop an integration and have it linked in the app store. It is seemingly a different system from the normal app upload process. And it is very inconvenient.

The workflow is as follows:
1. Log into apps.nextcloud.com
2. Click Integration developer > Register integration

3. Register the integration
4. Jos Poortvliet (the director of Marketing) receives an e-mail and has to approve the integration. Which he never does.

I think we should figure out which system this is and if we have to keep it, and if we have to keep it, we have to make sure that other people than Jos can approve the integration so that the integrations get reviewed faster.

@jancborchardt @AndyScherzinger please let me know if we have to keep this system

@bigcat88 it would be great if you could provide some details and your opinion on what to do here