fix(utils,core-flows): subtotal calculation and returns location (#13497)

* fix(utils,core-flows): subtotal calculation and returns location

* changeset

* fix test

* var

* rm extra field from test

* fix original total

* fix partial refunds and pending difference

* fix test

* fix test

* test

* extract to util

* original total and update payment when receive return

* original_subtotal

* default fields

* test

* calculate pending difference

* revert claims test

* pending difference

* creadit line fix

* if

integration-tests/http/__tests__/fixtures/order.ts

@@ -6,6 +6,7 @@ import {
   AdminStockLocation,
   MedusaContainer,
 } from "@medusajs/types"
+import { ContainerRegistrationKeys, Modules } from "@medusajs/utils"
 import {
   adminHeaders,
   generatePublishableKey,
@@ -175,6 +176,26 @@ export async function createOrderSeeder({
     adminHeaders
   )
 
+  const remoteLink = container.resolve(ContainerRegistrationKeys.LINK)
+  await remoteLink.create([
+    {
+      [Modules.SALES_CHANNEL]: {
+        sales_channel_id: salesChannel.id,
+      },
+      [Modules.STOCK_LOCATION]: {
+        stock_location_id: stockLocation.id,
+      },
+    },
+    {
+      [Modules.PRODUCT]: {
+        variant_id: product.variants[0].id,
+      },
+      [Modules.INVENTORY]: {
+        inventory_item_id: inventoryItem.id,
+      },
+    },
+  ])
+
   /**
    * Create shipping options for each shipping profile provided
    */