fix: Update tax lines on cart when region changes (#9367)

**What**
- Removes broken cart retrieval step `retrieveWithCartLinks` in favor of `useRemoteQueryStep` in `updateTaxLinesWorkflows`

**Why**
- Filters variables in the step were passed with an incorrect shape
  - I removed the step, since it's only used once and the behavior is identical to the generic remote query step

**Note**
- Because the filters were passed incorrectly, the, now-removed, step has always returned the first cart in the database. As a result all tax calculations so far have been based on whatever the shape of that cart has. It basically ignores all input to this workflow

packages/medusa/src/api/store/carts/[id]/taxes/route.ts

@@ -1,17 +1,15 @@
 import { updateTaxLinesWorkflow } from "@medusajs/core-flows"
+import { HttpTypes } from "@medusajs/framework/types"
 import { MedusaRequest, MedusaResponse } from "../../../../../types/routing"
 import { refetchCart } from "../../helpers"
-import { HttpTypes } from "@medusajs/framework/types"
 
 export const POST = async (
   req: MedusaRequest,
   res: MedusaResponse<HttpTypes.StoreCartResponse>
 ) => {
-  const workflow = updateTaxLinesWorkflow(req.scope)
-
-  await workflow.run({
+  await updateTaxLinesWorkflow(req.scope).run({
     input: {
-      cart_or_cart_id: req.params.id,
+      cart_id: req.params.id,
       force_tax_calculation: true,
     },
   })