Proper own any permissions

[idimopoulos]

This is a followup of #107 where the idea of changing strings was rejected. This splits the work that is reverted in that PR.

The idea is that the 'edit' operation is removed. We can now also fix the permission strings that currently have the form of
edit $bundle rdf entity to edit any rdf entity and
edit own $bundle rdf entity to edit the owned entity.
The same applies for the delete operation as well.

[pfrenssen]

Let's still support the old string, but throw deprecation warnings:

if ($account->hasPermission('edit ' . $entity_bundle . ' rdf entity')) {
  trigger_error('Permissions in the format "edit {bundle} rdf entity" is deprecated in RDF Entity 8.x-1.0-alpha19 and will be removed before 8.x-1.0-beta1. Use "edit any {bundle} rdf entity" instead. See https://issue/that/will/remove/deprecation');
  // fallback to old behaviour.
}