feat(core-flows, product): options checks on product create/update (#9171)

**What**
- validate that variants are unique with respect to options on product update/create and variant update/create
- validate that the product has options upon creation
- ensure variants have the same number of option values as the product has options
- admin error handling
- update tests

---

FIXES FRMW-2707 CC-556

integration-tests/http/__tests__/sales-channel/admin/sales-channel.spec.ts

@@ -327,6 +327,7 @@ medusaIntegrationTestRunner({
             "/admin/products",
             {
               title: "test name",
+              options: [{ title: "size", values: ["large"] }],
             },
             adminHeaders
           )