Add permission for resending emails

Thanks for the merge request.

An update hook would indeed be required, to grant all users that currently have permission to resend the email, that new permission.
Or alternatively, we could adjust the access check as follows:

Either you have access via the new permission OR you have access via the current access check logic.

That would avoid automatically adding permissions to users, which is maybe not what all site owners want to happen automatically...

Works on Drupal 10.3.5.

Thank you.