Fix(medusa): make shipping option requirements tax inclusive if the shipping option is (#2544)

**What**
- validate shipping option requirements including tax if the shipping option is tax inclusive

**Testing**
- " given a cart with total above min-threshold and subtotal below min-threshold shipping option with tax inclusive pricing is available and can be applied"
- "given a cart with total above max-threshold and subtotal below max-threshold shipping option with tax inclusive pricing is not available"

Fixes CORE-752

packages/medusa/src/services/cart.ts

@@ -1755,7 +1755,7 @@ class CartService extends TransactionBaseService {
     return await this.atomicPhase_(
       async (transactionManager: EntityManager) => {
         const cart = await this.retrieve(cartId, {
-          select: ["subtotal"],
+          select: ["subtotal", "total"],
           relations: [
             "shipping_methods",
             "discounts",

packages/medusa/src/services/shipping-option.ts

@@ -370,15 +370,15 @@ class ShippingOptionService extends TransactionBaseService {
       )
     }
 
-    const subtotal = cart.subtotal as number
+    const amount = (option.includes_tax ? cart.total : cart.subtotal) as number
 
     const requirementResults: boolean[] = option.requirements.map(
       (requirement) => {
         switch (requirement.type) {
           case "max_subtotal":
-            return requirement.amount > subtotal
+            return requirement.amount > amount
           case "min_subtotal":
-            return requirement.amount <= subtotal
+            return requirement.amount <= amount
           default:
             return true
         }