feat(medusa,pricing): Cart pricing context with customer group (#10579)

* fix(carts): Fixes cart modifications not accounting for certain price lists (#10493)

*What*

* Fixes #10490
* Expands any available customer_id into its customer_group_ids for cart
  updates that add line items.

*Why*

* Cart updates from the storefront were overriding any valid price lists
  that were correctly being shown in the storefront's product pages.

*How*

* Adds a new workflow step that expands an optional customer_id into the
  customer_group_ids it belongs to.
* Uses this step in the addToCartWorkflow and
  updateLineItemInCartWorkflow workflows.

*Testing*
* Using medusa-dev to test on a local backend.
* Adds integration tests for the addToCart and updateLineItemInCart
  workflows.

Co-authored-by: Riqwan Thamir <rmthamir@gmail.com>

* chore: update cart workflows to accept new pricing context

* chore: add transfer specs

* chore: fix specs

* chore: modify types + specs

* chore: add data migration + dashboard changes

* chore: fix update line item workflow

* chore: add changeset + unskip spec

---------

Co-authored-by: Sergio Campamá <sergiocampama@gmail.com>

packages/modules/pricing/src/migrations/Migration20241212190401.ts

@@ -0,0 +1,11 @@
+import { Migration } from "@mikro-orm/migrations"
+
+export class Migration20241212190401 extends Migration {
+  async up(): Promise<void> {
+    this.addSql(
+      `UPDATE price_list_rule SET attribute = 'customer.groups.id' WHERE attribute = 'customer_group_id';`
+    )
+  }
+
+  async down(): Promise<void> {}
+}