feat(product): Move mikro orm utils to the utils package (#4631)

Move utils to the utils package as much as possible

Co-authored-by: Shahed Nasser <27354907+shahednasser@users.noreply.github.com>

packages/product/integration-tests/__fixtures__/module.ts

@@ -1,6 +1,6 @@
-import { BaseRepository } from "../../src/repositories/base"
+import { DALUtils } from "@medusajs/utils"
 
-class CustomRepository extends BaseRepository {
+class CustomRepository extends DALUtils.MikroOrmBaseRepository {
   constructor({ manager }) {
     // @ts-ignore
     super(...arguments)