Create certification-issuing-process.md

Created by: alexander-diab

Hallo Eduard,

started to sketch the process for certification as discussed a while ago. To be iterated and discussed in the next SIG meetings.

I also would raise a question with respect to the check and issuing, which we might want to discuss: In a compliance check and certification issuing process. Do we have to capture and file, which infrastructure (e.g. by host names ) is specifically certified, i.e. where the script has been checked on standards?