Scaffolded Navigation Properties Forced to Use Navigation Suffix

There's no straightforward way to replace the "Navigation" suffix generated for navigation properties during database scaffolding. It's hard-coded [here](https://github.com/dotnet/efcore/blob/5aa72dffd4d0e8e91bc69e303ba1049a28695d3a/src/EFCore.Design/Scaffolding/Internal/RelationalScaffoldingModelFactory.cs#L21).

There are workarounds, but none of them are particularly pleasant. It would be much easier and more performant to simply allow developers to replace the hard-coded values through configuration or a design time service.