Windows 2022 support for GitLab SaaS runners now available

What this post added

Introduced support for Windows 2022 on GitLab SaaS runners, currently in Beta. This is a step towards general availability for SaaS runners. Windows 2019 and its associated tags (`shared-windows`, `windows-1809`) will be deprecated with GitLab 17.0. The new tag for Windows 2022 runners is `saas-windows-medium-amd64`.