Drops release_environment feature flag
What does this MR do and why?
- Drops release_environment feature flag
The release environments are now a requirement on stable branches. This commit removes the feature flag from the codebase. It also adds logging for debugging purposes.
Related to gitlab-com/gl-infra/delivery#20086
Author Check-list
- [-] Has documentation been updated?
Edited  by Mayra Cabrera