Update social_gdpr in accordance with the new version of Data Policy

Problem/Motivation

The data_policy module was updated here and as a result, our social_gdpr module doesn't work with multiple entities and new version of that module

Steps to reproduce

Now it is impossible to do any UI interaction within this module since we removed all forms and routes. This module only sets some default permissions and adds some small customization and test coverage.

Proposed resolution

We minimize existing code for the social_gdpr module since it is duplicate forms and logic from the data_policy module, and the second one already covers all that social_gdpr have, but we still want this module for test coverage and probably basic permissions setup.

Release notes

We minimize existing code for the `social_gdpr` module since it is duplicate forms and logic from the `data_policy` module, and the second one already covers all that `social_gdpr` have, but we still want this module for test coverage and probably basic permissions setup.

Also, we update the `data_policy` module from `1.0-beta6` to the latest `1.0@RC`, the newest version contains "Multiple checkbox functionality", see https://www.drupal.org/project/data_policy/issues/3201613 (https://git.drupalcode.org/project/data_policy/-/merge_requests/1).