GitLab

This is a temporary fix.

Another Python module we need, not sure why Linux has this installed by default yet Windows does not...

Split the Windows images in two - a base image for use by Craft and a more complete one for CI use on Gitlab

Lets try this again - this time with the process isolation flag instead

Turns out Docker for Windows is a massive snowflake when it comes to the --memory option, which for us is a bit of a worry when it comes to some of our builds...
Lets try just 2GB

Microsoft documentation indicates that the VS installation process can also require more memory than the 1GB usually allowed during Docker image builds.
Increase the limit accordingly (they suggest 2GB, but for extra safety lets make it 4GB)

Long story short - you cannot use installers that potentially have a GUI component within a Windows container unless you run them under cmd /S /C.
See https://jfreeman.dev/blog/2019/07/09/what-i-learned-making-a-docker-container-for-building-c++-on-windows/ for more details.

Switch from Powershell to Cmd.exe for MS Build Tools runs