Load sub-configs from composite configs (#34410)

* save/load sub-configs

* nit forgot these

* fix copies

* move test to common

* use dict for sub-configs

* add load-save-laod test

* clean up modeling check

* oops this are correct keys

* fix some tests, missed some composite configs

* this model was missed

tests/models/align/test_modeling_align.py

@@ -457,11 +457,20 @@ class AlignModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.TestCase):
 
     def setUp(self):
         self.model_tester = AlignModelTester(self)
+        self.config_tester = ConfigTester(
+            self,
+            config_class=AlignConfig,
+            has_text_modality=False,
+            common_properties=["projection_dim", "temperature_init_value"],
+        )
 
     def test_model(self):
         config_and_inputs = self.model_tester.prepare_config_and_inputs()
         self.model_tester.create_and_check_model(*config_and_inputs)
 
+    def test_config(self):
+        self.config_tester.run_common_tests()
+
     @unittest.skip(reason="Start to fail after using torch `cu118`.")
     def test_multi_gpu_data_parallel_forward(self):
         super().test_multi_gpu_data_parallel_forward()