[Native] The `mglib` project should be updated to use `MonoGame.Native`

# Summary

The `mglib` project still uses the older `desktopgl` library for referencing MonoGame, this should be updated to use the newer `MonoGame.Framework.Native` package, as follows

```
    <PackageReference Include="MonoGame.Framework.Native" Version="3.8.*" >
        <PrivateAssets>All</PrivateAssets>
    </PackageReference>
```