Fix GH-16237: Segmentation fault when cloning SoapServer

Bisect points to 94ee4f9, however this only reveals the problem.
Cloning an object on a lower branch and trying to call its metho

Fix GH-16237: Segmentation fault when cloning SoapServer

Bisect points to 94ee4f9, however this only reveals the problem.
Cloning an object on a lower branch and trying to call its methods
crashes as well. Cloning the object shouldn't be possible in the first
place because there's an engine constraint that when we have a new
object handler we should also have a clone handler. This constraint is
not fulfilled here.

Closes GH-16245.

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