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Add container support for Windows 2022 21H2

Arran Walker requested to merge ajwalker/windows-container-version-updates into main

What does this MR do?

  • Uses Kernel Version rather than Operating System reported by the Docker daemon to determine which image to use.
  • Re-introduces Windows 2022 support, but with the tag 21H2.

Why was this MR needed?

  • Using the kernel version/build umber is less error prone. Windows makes it clear which images are supported for a specific build number (which is why Kubernetes also opts for this approach).
  • Windows 2022 21H1 was never released, it was only ever a code name. There was a Windows 10 21H1 version, which is now EOL. This updates to use tag 21H2, also known as LTSC2022.

What's the best way to test this MR?

  • Updated tests should pass.
  • Pipeline for building images for 21H2 should work.

What are the relevant issue numbers?

Closes #30941 (closed)

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