Instead fetch the name from the respective structure. The only
place where this is still used is ReflectionClassConst,
as zend_class_const does not store the name.
Instead fetch the name from the function/class/property,
as appropriate. This makes us independent of the property,
and eliminates error conditions related to it.
Make sure we still perform a zpp check for the static case, and
also always enforce that the parameter is ?object. Otherwise we
violate the specified signature.
