Ensure tag task can be run in dry-run mode
What does this MR do and why?
Updates Gitaly, GitLab, Helm, Omnibus and CNG release classes to ensure tagging can be run in dry-run mode.
First step of gitlab-com/gl-infra/delivery#2607 (closed)
Author Check-list
- [-] Has documentation been updated?
Edited by Mayra Cabrera