Add check that all external packages used as synced across all repositories

#### Description:

Discussed with @adecler that we should add a check that ensures that any external package used by a project is not in conflict with the same package from a different version in a project in another repository. Could potentially be made part of the project compliance check, or turned into a completely new check.

Once implemented we should bulkrun the check across all repositories and ensure they are all in sync, and can then have the check run on PRs that are changing their exteral nuget usages in any way, either by adding a new package or changing version of an already existing one.