fix(medusa): Order service legacy decorate totals should add totals to items (#2667)

For some reason, probably a conflict, the legacy decorate totals does not attach the totals to the line items
https://github.com/medusajs/medusa/pull/2546/files

FIXES CORE-832

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

packages/medusa/src/services/order.ts

@@ -1498,6 +1498,27 @@ class OrderService extends TransactionBaseService {
     order: Order,
     totalsFields: string[] = []
   ): Promise<Order> {
+    if (totalsFields.some((field) => ["subtotal", "total"].includes(field))) {
+      const calculationContext =
+        await this.totalsService_.getCalculationContext(order, {
+          exclude_shipping: true,
+        })
+      order.items = await Promise.all(
+        (order.items || []).map(async (item) => {
+          const itemTotals = await this.totalsService_.getLineItemTotals(
+            item,
+            order,
+            {
+              include_tax: true,
+              calculation_context: calculationContext,
+            }
+          )
+
+          return Object.assign(item, itemTotals)
+        })
+      )
+    }
+
     for (const totalField of totalsFields) {
       switch (totalField) {
         case "shipping_total": {
@@ -1603,9 +1624,9 @@ class OrderService extends TransactionBaseService {
   }
 
   /**
+   * Calculate and attach the different total fields on the object
    * @param order
    * @param totalsFieldsOrConfig
-   * @protected
    */
   async decorateTotals(
     order: Order,