Add cache tags for invitations, when we allow to see a group

This is a follow up on #3293317-10: Users cannot see the name of the Group that they were invited → .

I have double checked the issue, I can find any issues with a cache here. So, I am not sure we need any cache tags handling here.
I will explain, since we use

\Drupal::service('ginvite.invitation_loader')->loadByProperties($properties);

This code based on group content. So, every time we delete invitation, it will correctly reset tags for group content entity and for group_content_list.

Feel free to provide more information, if you still think we should do something here