[EC-635] Extract organizationService.UpdateLicenseAsync to a command (#2408)

* move UpdateLicenseAsync from service to command
* create new SelfHostedOrganizationDetails view model and move license validation logic there
* move occupied seat count logic to database level

src/Infrastructure.EntityFramework/Repositories/Queries/OrganizationUserReadOccupiedSeatCountByOrganizationIdQuery.cs

@@ -0,0 +1,22 @@
+using Bit.Core.Enums;
+using Bit.Infrastructure.EntityFramework.Models;
+
+namespace Bit.Infrastructure.EntityFramework.Repositories.Queries;
+
+public class OrganizationUserReadOccupiedSeatCountByOrganizationIdQuery : IQuery<OrganizationUser>
+{
+    private readonly Guid _organizationId;
+
+    public OrganizationUserReadOccupiedSeatCountByOrganizationIdQuery(Guid organizationId)
+    {
+        _organizationId = organizationId;
+    }
+
+    public IQueryable<OrganizationUser> Run(DatabaseContext dbContext)
+    {
+        var query = from ou in dbContext.OrganizationUsers
+                    where ou.OrganizationId == _organizationId && ou.Status >= OrganizationUserStatusType.Invited
+                    select ou;
+        return query;
+    }
+}