Fully support complex types with the InMemory provider

[roji]

Some query/materialization support is missing, see tests DbContextTest.SaveChanges_calls_DetectChanges_by_default, DbContextTest.Auto_DetectChanges_for_SaveChanges_can_be_switched_off

[ajcvickers]

Note from triage: we are very unlikely to implement this. See #18457 (comment)

[aliastopan]

Is the KeyNotFoundException part of the reason why ComplexProperty has yet compatible with in-memory database?

"title": "KeyNotFoundException", "code": 500, "source": "System.Private.CoreLib", "detail": "The given key 'Property: UserAccount.User#User.EmailAddress (string) Required MaxLength(255)' was not present in the dictionary.", "stackTrace": [ " at TValue System.Collections.Generic.Dictionary<TKey, TValue>.get_Item(TKey key)", " at Expression Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryShapedQueryCompilingExpressionVisitor+ShaperExpressionProcessingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)",

[roji]

@aliastopan support hasn't been done for InMemory, this specific KeyNotFoundException may be part of that (or not). We're unlikely to implement support, since using the InMemory database for testing is discouraged - consider testing against your containerized database (e.g. SQL Server) using testcontainers.net.