Epic to collect the various changes needed in Distribution projects to support switching Ruby to version 3.1 - https://gitlab.com/groups/gitlab-org/-/epics/10034 Steps: 1. [x] Support building Ruby 3.1 - https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8258 and https://gitlab.com/gitlab-org/build/CNG/-/issues/727 2. [x] Switch feature branch builds to Ruby 3.1 - https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8259 and https://gitlab.com/gitlab-org/build/CNG/-/issues/724 3. [x] Switch nightlies to Ruby 3.1 - https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8260 4. [x] Switch auto-deploy to Ruby 3.1- https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8261 and https://gitlab.com/gitlab-org/build/CNG/-/issues/725 5. [x] Switch self-managed releases to Ruby 3.1 - https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8262 and https://gitlab.com/gitlab-org/build/CNG/-/issues/726