Enforce EEP license for Deploy Boards

Description

We announced Deploy Boards were EEP licensed, but haven't enforced it yet. We need to do so.

Proposal

Links / references

• Related: gitlab-com/www-gitlab-com#1244 (closed)

Documentation blurb

(Write the start of the documentation of this feature here, include:

1. Why should someone use it; what's the underlying problem.
2. What is the solution.
3. How does someone use this

During implementation, this can then be copied and used as a starter for the documentation.)