BO ps_emailsubscription not multistore compliant

[lmeyer1]

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

In the BO, on the configuration page of ps_emailsubscription, the list under the section Newsletter registrations shows the customers of all shops, disregarding the current shop context or the permissions of the employee.

Expected behavior

In a multishop installation, when a shop is selected, only the newsletter regitstrations of that show must be displayed.

Steps to reproduce

Prerequisite:

• Multishop activated
• At least 2 shops
• At least one customer that registered for newsletters in each shop

Steps to reproduce

1. Select a particular shop in the shops menu
2. Go to Module manager, search ps_emailsubscription, click on configure
3. Scroll down to `Newsletter registrations
4. You see the registrations of all shops

PrestaShop version(s) where the bug happened

8.1.5

PHP version(s) where the bug happened

8.1

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

ps_emailsubscription 2.8.2

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

Société Biblique de Genève