Cosmos: Make the 'id' property more flexible

[AndriySvyryd]

• Rename the id property created by convention to avoid it clashing with an entity property.
• Make sure that the property created by the convention is removed if any other property is mapped to id (the new property should get the value generator).
• Validate all properties have distinct database names
• Remove the value generator from the property mapped to id if it's part of the PK
• Validate that all entity types have an id property and that id and the partition key are mapped to string

[MedAnd]

Hi @AndriySvyryd - seems it's also not possible to override the PK name when mapping using the fluent api... could this bug be the reason this is not supported:

modelBuilder.Entity<VerificationResponse>(m => { m.ToContainer("VerificationResponses"); m.HasKey(k => k.CorrelationId).HasName("id"); m.HasPartitionKey(o => o.ShopperId); });