What
- Move sales channel integration tests from `/api` to `/http`
Deleted tests that do not belong in the suite:
- POST /admin/products/:id
- Mutation sales channels on products
- POST /admin/products
- Creating a product with a sales channel
- GET /admin/products
- Filtering products by sales channel
- Expanding with a sales channel
- GET /admin/orders
- Filtering orders by sales channel
- Expanding with a sales channel
- POST /admin/orders/:id/swaps
- Creating a swap with a sales channel