fix(pytest): handle parameterized tests without pytest discovery

Only emits position IDs with parameters when pytest discovery is enabled

See #36 and #59

neotest_python/unittest.py

@@ -17,7 +17,7 @@ class UnittestNeotestAdapter(NeotestAdapter):
         return str(Path(inspect.getmodule(case).__file__).absolute())  # type: ignore
 
     def case_id_elems(self, case) -> List[str]:
-        if case.__class__.__name__ == '_SubTest':
+        if case.__class__.__name__ == "_SubTest":
             case = case.test_case
         file = self.case_file(case)
         elems = [file, case.__class__.__name__]