EF Core 6.0.3

This is a patch release of EF Core 6.0 containing only important bug fixes:

• FirstOrDefault after custom projection == null cannot be translated
• DbContext scaffolding creates reference error CS0120 in nameof() for InverseProperty in certain conditions
• EF core 6 selecting null values despite where clause asking for not null
• Query: Rownumber conversion needs better logic to figure out partitions
• Suboptimal SQL generation for query with optional navigation, its collection navigation and lateral join
• Aggregates on multiple child tables produces invalid SQL
• ServiceProviderCache keeps initially created IServiceProvider indefinitely
• Setting a Nullable Foreign Key property to Null triggers cascade delete
• Optimize hangs and stops responding