Remove domain_entity_load hook from module

Changing issue priority to Major as per issue priorities →

Steps to reproduce:
- Install Country Path 8.x-1.x ( dev branch ).
- Enable Domain and Country Path.
- Go to "/admin/config/domain" and create multiple domains.
- Navigate to the different domains, validate they load properly.
- Apply this patch to the Country path module ( https://www.drupal.org/project/country_path/issues/2961459 🐛 Country path not managed in domain navigation block Needs work ).
- Navigate to any page in any domain. There is an infinite loop and the pages fail to load.

Then, apply the merge request diff ( https://git.drupalcode.org/project/domain/-/merge_requests/135.diff ) to domain module and clear caches. The domains should load properly now.