[AC-2025] Add Organization.FlexibleCollections to database and sprocs (#3642)

* Add Organization.FlexibleCollections property and column

* Add new property to OrganizationAbility

* Add SQL and EF migrations

src/Core/AdminConsole/Entities/Organization.cs

@@ -91,6 +91,11 @@ public class Organization : ITableObject<Guid>, ISubscriber, IStorable, IStorabl
     /// </remarks>
     /// </summary>
     public bool AllowAdminAccessToAllCollectionItems { get; set; }
+    /// <summary>
+    /// True if the organization is using the Flexible Collections permission changes, false otherwise.
+    /// For existing organizations, this must only be set to true once data migrations have been run for this organization.
+    /// </summary>
+    public bool FlexibleCollections { get; set; }
 
     public void SetNewId()
     {