Proj0812: Remove redundant packages references that are globally referenced

When using Central Package Management, it is possible to define (private) global package references with the use of <GlobalPackageReference> in the Directory.Packages.props file.

Including package references with <PackageReference> that are already referenced through a <GlobalPackageReference> is redundant.

Non-compliant

<Project>

  <ItemGroup>
    <GlobalPackageReference Include="DotNetProjectFile.Analyzers" Vesion="1.8.0" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="DotNetProjectFile.Analyzers" />
  </ItemGroup>

</Project>

Compliant

<Project>

  <ItemGroup>
    <GlobalPackageReference Include="DotNetProjectFile.Analyzers" Vesion="1.8.0" />
  </ItemGroup>

</Project>