[Darc] Use Directory.Build.props for Arcade SDK versions

[jcagme]

Originally, the Arcade SDK version was planned to be maintained in global.json. In #320 a change to this was discussed and now it was agreed that the version is going to be stored in Directory.Build.props.

Currently Darc will try to update, if needed, the version in global.json so we need to make the change to track Arcade SDK's version in Directory.Build.props instead.

[tmat]

I don't think there has been any conclusion yet. I specifically dislike adding the version to Directory.Build.props.

[jcagme]

Got it, will keep an eye the original issue to make sure we react as needed

[jcagme]

We've decided to keep the version in global.json and this is what Darc updates