WS : Products - The response of the GET request has not defined the field `new`

Prerequisites

• I understand and accept the project's code of conduct.
• I have already searched in existing issues and found no previous report of this bug.

Describe the bug and add attachments

WS : Products - The response of the GET request has not defined the field new

Expected behavior

WS : Products - The response of the GET request has defined the field new

Steps to reproduce

1. Enable WS
2. Create a WS Key
3. Request a GET query to http;//domain.tld/api/products/3 for example

In the response of the POST query, it's is filled. Not in the response of GET query.

Response of the POST query :+1:

Response of the GET query :-1:

Acceptance Test

Unskip tests

• https://github.com/PrestaShop/PrestaShop/blob/d6bd4586da1d519e3ccb6ce2dd2420b9a755b5b2/tests/UI/campaigns/functional/WS/02_productsCRUD.ts#L440-L441
• https://github.com/PrestaShop/PrestaShop/blob/d6bd4586da1d519e3ccb6ce2dd2420b9a755b5b2/tests/UI/campaigns/functional/WS/02_productsCRUD.ts#L1121-L1122

PrestaShop version(s) where the bug happened

9.0.x

PHP version(s) where the bug happened

8.1

If your bug is related to a module, specify its name and its version

No response

Your company or customer's name goes here (if applicable).

@PrestaShopCorp