Checking Renamed Classes and Properties explicitely in Shapes

[sebbader]

The update of the ids:offered property to ids:offeredResource is ambiguous, as descriptions using the first "look pretty good" during debugging, while the latter needs to be in place.
Suggestion:
Whenever we remove or rename an RDF entity in a breaking change, let's add a new shape what explicitly checks for the old entity and comes up with a direct and understandable error message.

[HaydarAk]

We already have an issue regarding release management (see #381)

We may consider adding such shapes to support debugging between two versions.