While implementing the compiled model tests for EFCore.PG, I ran against the problem that some of them (e.g. Tpc, ComplexTypes) happen to also use sprocs, and with a return value as well; that's something that (AFAIK) is only supported on SQL Server. Ideally, these tests would use anything that isn't universal, to allow for maximum coverage for providers etc.

Originally raised in https://github.com/dotnet/efcore/pull/32341/files#r1485603038