Add selection mechanism in graph

See aidge_core!332 (merged).

This MR adds an optional dependency of aidge_backend_cpu to OpenSSL, necessary for the implementation of operator CryptoHash. If OpenSSL is not detected, the operator implementation simply won't be available.

aidge_backend_cpu/unit_tests/test_scheduler.py

@@ -57,9 +57,9 @@ class test_scheduler(unittest.TestCase):
         scheduler = aidge_core.SequentialScheduler(graph_view)
         scheduler.generate_scheduling()
 
-        self.assertEqual(len(scheduler.get_static_scheduling()), 10)
+        self.assertEqual(len(scheduler.get_sequential_static_scheduling()), 10)
         # Do not care about the order of execution of the producers
-        self.assertListEqual([i.name() for i in scheduler.get_static_scheduling()[-3:]], EXPECTED_SCHEDULE)
+        self.assertListEqual([i.name() for i in scheduler.get_sequential_static_scheduling()[-3:]], EXPECTED_SCHEDULE)
 
 
     def test_parallel_scheduling(self):
@@ -83,9 +83,9 @@ class test_scheduler(unittest.TestCase):
         scheduler = aidge_core.SequentialScheduler(graph_view)
         scheduler.generate_scheduling()
 
-        self.assertEqual(len(scheduler.get_static_scheduling()), 11)
+        self.assertEqual(len(scheduler.get_sequential_static_scheduling()), 11)
         # Do not care about the order of execution of the producers
-        self.assertTrue([i.name() for i in scheduler.get_static_scheduling()[-4:]] in EXPECTED_SCHEDULE)
+        self.assertTrue([i.name() for i in scheduler.get_sequential_static_scheduling()[-4:]] in EXPECTED_SCHEDULE)
 
 if __name__ == '__main__':
     unittest.main()