Code Quality: Enable NuGet Transitive Pinning

[dfederm]

Resolved / Related Issues
N/A

Steps used to test these changes
Build (no behavioral changes expected)

Changes
This enables Transitive Pinning which essentially makes your Directory.Packages.props a partial lock file. If a package is listed in Directory.Packages.props, that will be the version, even if a project doesn't explicitly reference that package and it's just a transitive dependency. This is the primary benefit of transitive pinning, to ensure all projects within the repo are using the same version of all packages. It also allows security issues in transitive dependencies to be more easily addressed by simply updating Directory.Packages.props instead of adding a top-level dependency to all impacted projects, which is far messier and less maintainable.

[yair100]

Thank you for the pull request.

In the future, it's recommended to only open pull requests for issues marked 'Ready to build', this helps prevent extra work in the event we don't end up accepting a change.

In any event, since the work is already done, we'll take a look 🙂