If we want to enable dev/ci configurations (and find out what evil lurks within when we do that may affect product builds), the build needs to stop assuming the package versions of the tooling repos. After using the bootstrap arcade to build arcade, it then tries to extract arcade again to set up the msbuild sdks for downstream use. This requires finding the file. It uses the version imported from AllRepoVersions;props to do this.

It should instead use the version obtained from the arcade build output (so it could be 9.0.0-ci).