chore(medusa): New totals calc. in Swap creation (#3191)

* feat(medusa): Cleanup swap creation flow

* revert test and package

* fix unit tests

* fix swap seeder that does not include the tax lines on the return line item

---------

Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/medusa/src/api/routes/admin/orders/create-swap.ts

@@ -138,9 +138,9 @@ export default async (req, res) => {
               .workStage(idempotencyKey.idempotency_key, async (manager) => {
                 const order = await orderService
                   .withTransaction(manager)
-                  .retrieve(id, {
-                    select: ["refunded_total", "total"],
+                  .retrieveWithTotals(id, {
                     relations: [
+                      "cart",
                       "items",
                       "items.tax_lines",
                       "swaps",