feat: Add necessary middlewares for tax inclusive pricing (#7827)

We are adding tax inclusive pricing calculation when listing products.

Two things to keep in mind:
- `region_id` will be required if you request calculated prices.
- We won't accept `currency_code` anymore, as that will come from the region info (since ultimately a cart and its currency are tied to a region)

REF CORE-2376
DEPENDS ON #8003

packages/modules/pricing/integration-tests/__tests__/services/pricing-module/calculate-price.spec.ts

@@ -1449,6 +1449,39 @@ moduleIntegrationTestRunner<IPricingModuleService>({
             ])
           })
 
+          it("should return the region tax inclusivity for the selected price when there are multiple region preferences", async () => {
+            await (service as any).createPricePreferences([
+              {
+                attribute: "region_id",
+                value: "DE",
+                is_tax_inclusive: false,
+              },
+              {
+                attribute: "region_id",
+                value: "PL",
+                is_tax_inclusive: true,
+              },
+            ])
+
+            const priceSetsResult = await service.calculatePrices(
+              { id: ["price-set-PLN"] },
+              {
+                context: { currency_code: "PLN", region_id: "PL" },
+              }
+            )
+
+            expect(priceSetsResult).toEqual([
+              expect.objectContaining({
+                id: "price-set-PLN",
+                is_calculated_price_tax_inclusive: true,
+                calculated_amount: 300,
+                is_original_price_tax_inclusive: true,
+                original_amount: 300,
+                currency_code: "PLN",
+              }),
+            ])
+          })
+
           it("should return the appropriate tax inclusive setting for each calculated and original price", async () => {
             await createPriceLists(service, {}, {})
             await (service as any).createPricePreferences([