Misc project cleanup

[MichaelSimons]

The following cleanup changes were made.

1. Rename the repo project to repo-projects to align with the VMR directory structure
2. Removed the unused RepoApiImplemented properties
3. Removed the unused RepositoryName override capability. This is needed as part of Add VMR sync functionality into dotnet/dotnet's Codespaces installer#15750 (comment)
4. Cleanup the netcorecli-fsc and newtonsoft-json projects. There were some redundant build args being passed and some long lines that were hard to read pending your editor.
5. Removed the DeterministicBuildOptOutProperty as every repo was specifying it except netcorecli-fsc which from my assessment doesn't matter since that repo has no binaries in the resulting package. If it did, it likely needs this property set.

I made separate commits for each of this to make reviewing the changes easier.

[MichaelSimons]

cc @premun