Test that the project has not hit GitLab Pages redirect quota
GitLab Pages only supports 1,000 redirects: https://docs.gitlab.com/ee/user/project/pages/redirects.html#create-redirects
Let's add a test to warn if we're near this limit.
- Test could check how many lines are in
static/_redirects
- Warn on pipeline if there are over 900 redirects
- Fail pipeline if there are 1000+ redirects