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>

.changeset/warm-comics-return.md

@@ -0,0 +1,10 @@
+---
+"@medusajs/dashboard": patch
+"@medusajs/core-flows": patch
+"@medusajs/pricing": patch
+"@medusajs/types": patch
+"@medusajs/utils": patch
+"@medusajs/medusa": patch
+---
+
+feat(medusa, pricing): Cart workflows handle pricing context accurately