feat: Enable filtering admin products by variant EAN, UPC, and barcode (#12815)

* Add filters for variant ean, upc, and barcode in product queries and validators

* fix: Omit 'q' field from variants in product list and validation parameters

* Add tests for admin products filtering by variants ean, upc, and barcode

* Add changeset for filter admin products api by variant ean, upc, and barcode

---------

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/core/types/src/http/product/admin/queries.ts

@@ -24,6 +24,18 @@ export interface AdminProductVariantParams
    * out of stock.
    */
   allow_backorder?: boolean
+  /**
+   * Filter by variant ean(s).
+   */
+  ean?: string | string[]
+  /**
+   * Filter by variant upc(s).
+   */
+  upc?: string | string[]
+  /**
+   * Filter by variant barcode(s).
+   */
+  barcode?: string | string[]
   /**
    * Apply filters on the variant's creation date.
    */
@@ -46,5 +58,5 @@ export interface AdminProductListParams
   /**
    * Apply filters on the product variants.
    */
-  variants?: AdminProductVariantParams
+  variants?: Omit<AdminProductVariantParams, "q">
 }