licensing: enforce site admin roles (!15570) · Merge requests · Administrator / sourcegraph · GitLab

Administrator requested to merge jc/rfc167-site-admin-roles into main Nov 09, 2020

Created by: unknwon

Non-site admins are not allowed in Free tier.

All new users are promoted to be side admins in Free tier
Prevent user creation with a malformed/expired license
Prevent revoking site admins
Dotcom: no new users can be promoted to site admin automatically

Unit tests are added and tested end-to-end.

Fixes #14023