chore: small Cloudflare improvements
A follow-on to https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/17506#note_1343364560.
- Removes environment selector for WAF (all data is in ops environment)
- Sets WAF service as stageless (there is no stage division in CloudFlare)
- Some small cosmetic changes
Test snapshot here: https://dashboards.gitlab.net/dashboard/snapshot/oQlhwj5A6Z5RlXWBoTfJpL40ZJSF7zq6
Edited by Andrew Newdigate