feat(medusa): add sku to variant query params (#11151)

what:

- adds sku to variant query params

packages/core/types/src/product/common.ts

@@ -697,6 +697,10 @@ export interface FilterableProductProps
    * The handles to filter products by.
    */
   handle?: string | string[]
+  /**
+   * The skus to filter products by.
+   */
+  sku?: string | string[]
   /**
    * The IDs to filter products by.
    */
@@ -1239,7 +1243,7 @@ export interface UpdateProductOptionValueDTO {
 
 /**
  * @interface
- * 
+ *
  * Inventory kit for creating a product variant.
  */
 export interface CreateProductVariantInventoryKit {