Fix upsert billing (#24)

This commit updates the product_id and variant_id in both the subscription_items and order_items in the billing tests. Updates also include adding new checks to verify these changes. Changes are reflected in corresponding SQL files for personal and team billing subscriptions/orders tests.

apps/web/supabase/migrations/20221215192558_schema.sql

@@ -1645,9 +1645,12 @@ on conflict (
         item_data
     on conflict (id)
         do update set
+            product_id = excluded.product_id,
+            variant_id = excluded.variant_id,
             price_amount = excluded.price_amount,
             quantity = excluded.quantity,
             interval = excluded.interval,
+            type = excluded.type,
             interval_count = excluded.interval_count;
 
     return new_subscription;
@@ -2018,6 +2021,8 @@ on conflict (
     on conflict (id)
         do update set
             price_amount = excluded.price_amount,
+            product_id = excluded.product_id,
+            variant_id = excluded.variant_id,
             quantity = excluded.quantity;
 
     return new_order;
@@ -2486,7 +2491,9 @@ returns table (
   primary_owner_user_id uuid,
   subscription_status public.subscription_status,
   permissions public.app_permissions[]
-) as $$
+)
+set search_path to ''
+as $$
 begin
     return QUERY
     select