Properties that use operator.attrgetter as their getter cause an error

[apotterri]

This was originally discovered when trying to run tests in django:

ERROR: test_works_normally (generic_relations.tests.ProxyRelatedModelTest)
When for_concrete_model is False, we should still be able to get
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Traceback (most recent call last):
  File "/Users/kgilpin/source/land-of-apps/django/venv/lib/python3.10/site-packages/_appmap/wrapt/wrappers.py", line 719, in __call__
    return self._self_wrapper(self.__wrapped__, self._self_instance,
  File "/Users/kgilpin/source/land-of-apps/django/venv/lib/python3.10/site-packages/_appmap/unittest.py", line 39, in callTestMethod
    wrapped(test_method, **kwargs)
  File "/usr/local/Cellar/python@3.10/3.10.11/Frameworks/Python.framework/Versions/3.10/lib/python3.10/unittest/case.py", line 549, in _callTestMethod
    method()
...
File "/Users/kgilpin/source/land-of-apps/django/venv/lib/python3.10/site-packages/_appmap/instrument.py", line 88, in call_instrumented
    call_event = f.make_call_event(parameters=params)
  File "/Users/kgilpin/source/land-of-apps/django/venv/lib/python3.10/site-packages/_appmap/event.py", line 318, in __init__
    self._fqfn = FqFnName(fn)
  File "/Users/kgilpin/source/land-of-apps/django/venv/lib/python3.10/site-packages/_appmap/utils.py", line 85, in __init__
    qualname = fn.__qualname__
AttributeError: 'operator.attrgetter' object has no attribute '__qualname__'