[Bug]: Enforce branch validation rules on addons-server

[KevinMind]

What happened?

When a branch contains invalid docker version characters like / or : it breaks tagging that relies on this information.

Ex: https://app.circleci.com/pipelines/github/mozilla/addons-server/33002/workflows/ec04dd9c-a8ff-4953-b12b-5559ce671344/jobs/217751

What did you expect to happen?

Github should prevent pushing branches that are not also valid docker image versions. This way we don't have to do any kind of validation/transformation in our CI.

Is there an existing issue for this?

• [X] I have searched the existing issues

┆Issue is synchronized with this Jira Task