Deprecation warnings from commerce-shop in from AbstractUserDataMap and UserDataMapInterface.

Steps:

1. Install Ibexa Commerce v3.3 / v4.0 on PHP 8.
2. Visit frontend.
3. Log in as private customer. (optional)
4. Go to basket.
5. Restart web server.
6. Reload page.

Actual result: Deprecations are displayed for AbstractUserDataMap and UserDataMapInterface (attached).
Expected result: No deprecation warnings are triggered.