Add test coverage to ensure interop with Microsoft.Owin.Security and aspnetcore 3.0+ works #4074
Description
In aspnet/Security#1916, we had to entirely disable Owin cookie interop tests as a result of changing target framework support. We should re-write these tests in a way that lets us test the supported scenarios without requiring a hack to run aspnetcore assemblies on .NET Framework.
The scenarios we need to ensure continue to work are:
- Cookies and keys created by ASP.NET Core 3.0+ interop with Owin/Katana using Microsoft.Owin.Security.Interop 2.1.
- Vice versa
- Any changes to cookie formats and key formats made in 3.0+ stay backwards compatible with DataProtection 2.1