Remove v1-related code from medusa app (#7326)

* chore: Remove unused validations and utilities

* chore: Remove all resources that are not being loaded

* chore: Remove unused dependencies, typeorm related code and fix tests

* chore: Use createAdminUser in all module tests

integration-tests/api/__tests__/admin/product.js

@@ -73,7 +73,7 @@ const getProductFixture = (overrides) => ({
 })
 
 medusaIntegrationTestRunner({
-  env: { MEDUSA_FF_PRODUCT_CATEGORIES: true },
+  env: { MEDUSA_FF_PRODUCT_CATEGORIES: true, MEDUSA_FF_MEDUSA_V2: true },
   testSuite: ({ dbConnection, getContainer, api }) => {
     let baseProduct
     let proposedProduct