Changes to packages.gitlab.com: What you need to know

What this post added

This post details the migration of `packages.gitlab.com` to a new package hosting system, impacting URL formats, GPG key locations, network requirements, and the UI. It outlines the timeline for the transition, the required actions for users with existing installations (re-running installation scripts, updating GPG key references, firewall allowlists, mirroring configurations, and Runner RPM references), and the specific changes in DEB repository URLs, GPG key URLs, installation scripts, direct package download URLs, and GitLab Runner `noarch` RPM package paths. It also highlights the shift in download redirection to Google Cloud Storage and the need to update firewall/proxy allowlists. UI changes and feedback mechanisms are also mentioned.