Release Flatcar Container Linux Alpha 3480.0.0, Beta 3446.1.0, Stable 3374.2.2

The release of Flatcar Container Linux Alpha 3480.0.0, Beta 3446.1.0, Stable 3374.2.2 is planned for January 11th, 2023

Tasks

• Go / No Go hackmd doc created from previous one for test tracking and release notes: link (@sayanchowdhury)
• All planned changes are merged & blocker bugs are fixed, last nightly reviewed for problems (@sayanchowdhury)
• Branch off main (only new major) (@sayanchowdhury)
• Tag build branch (@sayanchowdhury)
• Start Jenkins builds, post links as comment (@sayanchowdhury)
• Test status captured in hackmd doc (@sayanchowdhury)
• All tests are green (@sayanchowdhury)
• Release notes / announcements added to Go/No Go doc from container/image_changes job by selecting Timestamps: None (@sayanchowdhury)
• QA: check diff for image file list, packages, and image size in the image job output (@dongsupark)
• Matrix Go/No Go meeting (inc. release notes review) (@sayanchowdhury)
• Update payload signed/uploaded (@dongsupark)
• scripts release created on GitHub (@dongsupark)
• Release job container/release ran (@dongsupark)
• Images uploaded with copy-to-origin.sh (@dongsupark)
• Azure offer updated & publishing started (@sayanchowdhury )
• Azure Go Live (@sayanchowdhury )
• GCP offers updated (@sayanchowdhury )
• Symlink to "current" updated with set-symlink.sh (@dongsupark)
• Website updated with ./update-flatcar-versions.sh and PR merged (@dongsupark)
• Release package published in Nebraska (@dongsupark)
• Send announcement to Mailing Lists (@miao0miao)
• Send Toot out (@ahrkrak)
• Brief version announcement in slack (k8s slack #flatcar) and the Flatcar matrix channel (@dongsupark)