Switch Windows Packaging Envrionement from Windows Server Core 18.09 to Windows Server Core LTSC~2019~ 2022

[dduportal]

Feature Request

As for today, we are sticking to an old version of hte inbound agent with the Windows packaging process:

release/PodTemplates.d/package-windows

Line 11 in 833c03a

- image: "jenkins/inbound-agent:4.3-9-windowsservercore-1809"

• Agent version is 4.9.x while last stable is 4.11.2 for today
• Windows Server Core 18.09 isn't a LTS and isn't supported anymore by Microsoft, and we (Jenkins project) do not build agent anymore for it:
  • https://docs.microsoft.com/en-us/windows-server/get-started/servicing-channels-comparison#long-term-servicing-channel-ltsc
  • https://hub.docker.com/r/jenkins/inbound-agent/tags?page=1&name=windowsservercore

We should bump the Windows packaging agent to use the 4.11.2-2-windowsservercore-ltsc2019 image.

[dduportal]

Thanks @timja for pointing that this 2022 version might not available on our AKS 1.20.x cluster in jenkins-infra/docker-packaging#23 (comment) .

[dduportal]

It's 2023 and we could (should) switch to a 2022 image:

• Create node pool in AKS (1.25+) for Windows 2022 in addition to current
• Update the image build and references to 2022
• Test a release
• Remove 2019 nodepool