split experiment_id into experiment_class and simulation_id

experiment_class for somethenig like PI_CONTROL
simulation_id for something like flo1234

experiment.py

@@ -21,7 +21,8 @@ class icon_setup(model_setup):
 @serde
 @dataclass
 class experiment:
-    experiment_id: str
+    experiment_class: str
+    simulation_id: str
     model: str
     setup: icon_setup | model_setup
     point_of_contact: str

test_experiment.py

@@ -14,7 +14,8 @@ class test_experiment(unittest.TestCase):
         commit_id="abc123",
     )
     experiment = experiment.experiment(
-        experiment_id="test",
+        experiment_class="test",
+        simulation_id="test123",
         model="icon",
         setup=setup,
         point_of_contact="flo",
@@ -36,7 +37,8 @@ class test_experiment(unittest.TestCase):
 
         with self.assertRaises(TypeError):
             experiment.experiment(
-                experiment_id="test",
+                experiment_class="test",
+                simulation_id="test123",
                 model="icon",
                 setup="BAD SETUP",  # !
                 point_of_contact="flo",
@@ -48,7 +50,8 @@ class test_experiment(unittest.TestCase):
 
         with self.assertRaises(TypeError):
             experiment.experiment(
-                experiment_id="test",
+                experiment_class="test",
+                simulation_id="test123",
                 model="icon",
                 setup=test_experiment.setup,
                 point_of_contact="flo",