Uniformize OwlViT and Owlv2 processors (#35700)

* uniformize owlvit processor

* uniformize owlv2

* nit

* add positional arg test owlvit

* run-slow: owlvit, owlv2

* run-slow: owlvit, owlv2

* remove one letter variable

tests/models/owlvit/test_processor_owlvit.py

@@ -232,6 +232,21 @@ class OwlViTProcessorTest(ProcessorTesterMixin, unittest.TestCase):
         with pytest.raises(ValueError):
             processor()
 
+    def test_processor_query_images_positional(self):
+        processor_components = self.prepare_components()
+        processor = OwlViTProcessor(**processor_components)
+
+        image_input = self.prepare_image_inputs()
+        query_images = self.prepare_image_inputs()
+
+        inputs = processor(None, image_input, query_images)
+
+        self.assertListEqual(list(inputs.keys()), ["query_pixel_values", "pixel_values"])
+
+        # test if it raises when no input is passed
+        with pytest.raises(ValueError):
+            processor()
+
     def test_tokenizer_decode(self):
         image_processor = self.get_image_processor()
         tokenizer = self.get_tokenizer()