Refactor Attention implementation for ViT-based models (#36545)

* Refactor vit attention

* Refactor ViT-based models

* 🚨🚨🚨 Fix prefix for DPT

* Update params order

* trigger tests

* Fix Dinov2 attention

* Fix DPT attention impl propagation for backbone config

* Common test fix: config is modif. inplace - avoid it

* view->reshape

* Fixup

* Fixup

* Enable IJepa FA2

* Add FA2 in corresponding model docs

tests/models/dpt/test_modeling_dpt.py

@@ -255,6 +255,10 @@ class DPTModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.TestCase):
     def test_training_gradient_checkpointing_use_reentrant_false(self):
         pass
 
+    @unittest.skip(reason="Inductor error for dynamic shape")
+    def test_sdpa_can_compile_dynamic(self):
+        pass
+
     def test_initialization(self):
         config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()