Update NGINX recipes
Remove the two NGINX files that were confusing, and update the readme.
Omnibus users could use the self-compiled NGINX files that we have https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/support/nginx.
The 17.0 major release is coming on May 16, 2024! This version brings many exciting improvements to GitLab, but also removes some deprecated features. We are introducing three breaking change windows during which we expect breaking changes to be deployed to GitLab.com. You can read more about it on our blogpost. The second breaking change window begins 2024-04-29 09:00 UTC and ends 2024-05-01 22:00 UTC.
Remove the two NGINX files that were confusing, and update the readme.
Omnibus users could use the self-compiled NGINX files that we have https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/support/nginx.