fix(medusa): Update line item adjustments upon cart discount removal

[adrien2p]

What

When a discount is deleted from a cart, the line item adjustments must be refreshed. Now, the cart service removeDiscount includes updating the adjustments.

Tests

Add a new integration test which:

• create a cart with a discount
• add a line item
• validate the adjustments
• remove the discount
• check that the adjustments are not present anymore

Update unit tests
The actual tests cases now check that the adjustments repository is called when needed

FIXES CORE-890

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🦋 Changeset detected

Latest commit: acd407e

The changes in this PR will be included in the next version bump.

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@medusajs/medusa	Patch

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[olivermrbl]

todo: We also allow you to remove discounts by sending:

POST /store/carts/{id}
{ discounts: [] }

So we should also fix the update cart flow.

[olivermrbl]

LGTM, just a minor todo before we merge 🚀

[olivermrbl]

LGTM!