[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

util/MySqlMigrations/Migrations/DatabaseContextModelSnapshot.cs

@@ -65,6 +65,9 @@ namespace Bit.MySqlMigrations.Migrations
                     b.Property<DateTime?>("ExpirationDate")
                         .HasColumnType("datetime(6)");
 
+                    b.Property<bool>("FlexibleCollections")
+                        .HasColumnType("tinyint(1)");
+
                     b.Property<byte?>("Gateway")
                         .HasColumnType("tinyint unsigned");