Add repository_access_level issue to GitLab FAQ

Created by: dadlerj

Reported by https://app.hubspot.com/contacts/2762526/company/1783614661 in https://sourcegraph.atlassian.net/jira/servicedesk/projects/SG/queues/custom/1/SG-320

Is this the wrong place for this to go? I don't like the idea of a bunch of different FAQs, but this feels too specific to go into the main admin FAQ. Curious what you think @kghopson