Bump Container Registry to v3.21.0-gitlab

See merge request gitlab-org/build/CNG!859

Upgrade MailRoom to v0.0.18

See merge request gitlab-org/build/CNG!854

Remove gitlab-shell-libproxyproto image

See merge request gitlab-org/build/CNG!855

Update golang to 1.16.12

See merge request gitlab-org/build/CNG!853

This drops support for the custom gitlab-shell container with
libproxyproto support added in
https://gitlab.com/gitlab-org/build/CNG/-/merge_requests/657.

We no longer need a custom gitlab-shell built with libproxyproto, as
this container is not used and gitlab-sshd is almost in production
(https://gitlab.com/groups/gitlab-com/gl-infra/-/epics/603).

This reverts commit 43b50e73, reversing
changes made to ee6dc58b.

This adds JWT authentication to support delivering e-mail via an API
handler:
https://gitlab.com/gitlab-com/gl-infra/scalability/-/issues/1457

Diff: https://my.diffend.io/gems/gitlab-mail_room/0.0.15/0.0.18

Bump container registry to v3.20.0

See merge request gitlab-org/build/CNG!852

Fix: should use final dir when autodeploy

See merge request gitlab-cn/build/cng-images!18

Because we need image with final tags for later autodeploy rollout

Upgrade to Postgres 14.1 for client libraries

See merge request gitlab-org/build/CNG!843

Changelog: changed

Add images to final list and sync them when autodeploy

See merge request gitlab-cn/build/cng-images!17

Revert "Merge branch 'push-images-from-final-list-when-autodeploy' into 'main-jh'"

See merge request gitlab-cn/build/cng-images!16

This reverts merge request !15

Push images from final list when it is  an auto deploy tag

See merge request gitlab-cn/build/cng-images!15

Sync auto deploy images to tcr

See merge request gitlab-cn/build/cng-images!14

Adding skip flag to restore operation

See merge request gitlab-org/build/CNG!845

Changelog: added

Cleanup temp directories before creating backups

Closes gitlab-org/charts/gitlab#3041

See merge request gitlab-org/build/CNG!846

Changelog: changed

Notify of ruby upgrade process via Danger

Closes gitlab-org/distribution/team-tasks#969

See merge request gitlab-org/build/CNG!847

Fix offline prepare script

See merge request gitlab-org/build/CNG!851