Add version number to windows helper image tags
What does this MR do?
Changes the release script for the Windows helper images so that they can be referenced via their version numbers.
Why was this MR needed?
Currently we need to reference them via their digests which makes it a bit hard to maintain.
What's the best way to test this MR?
This logic seems to run only on tags and main, so I guess we can only verify by pulling the bleeding tag after merging:
docker pull registry.gitlab.com/gitlab-org/gitlab-runner/gitlab-runner-helper:x86_64-bleeding-servercore1809
What are the relevant issue numbers?
/cc @dlouzan
Edited by Florian Greinacher