Use windows autoscaler for windows test in Runner project
Overview
In &1768 (closed) we are working on a shared Runner MVC which will autoscale windows machines. The GitLab Runner project should be first to consume this custom executor driver to dogfood even before production has set up shared Runners for GitLab.com. This would help us get early feedback on provisioning time, running tests and building Docker images. This requires the custom executor driver to be finished. We can check progress in &1768 (closed)
Proposal
Set a Runner manager just for this group, which will runer the Windows jobs that run tests and build docker images.
Edited by Steve Xuereb