also raise on exposed Python 3.10 cmethod/smethod

[bnavigator]

tests/PyroTests/test_util.py::TestMetaAndExpose::testClassmethodExposeWrongOrderFail fails on Python 3.10, because there was a change in the API:

abuild@skylab:~/rpmbuild/BUILD/Pyro4-4.80> cat mytest.py
def mydeco(method_or_class):
   attrname = getattr(method_or_class, "__name__", None)
   print(attrname)
   return method_or_class

class TestClass:
  @mydeco
  @classmethod
  def cmethod(cls):
     pass

  @mydeco
  @staticmethod
  def smethod(cls):
     pass

abuild@skylab:~/rpmbuild/BUILD/Pyro4-4.80> python3.8 mytest.py 
None
None
abuild@skylab:~/rpmbuild/BUILD/Pyro4-4.80> python3.10 mytest.py 
cmethod
smethod

[bnavigator]

Oops. The 'cmethod', 'smethod' are my own example names