[Conditional, Deformable DETR] Add postprocessing methods (#19709)

* Add postprocessing methods

* Update docs

* Add fix

* Add test

* Add test for deformable detr postprocessing

* Add post processing methods for segmentation

* Update code examples

* Add post_process to make the pipeline work

* Apply updates

Co-authored-by: Niels Rogge <nielsrogge@Nielss-MacBook-Pro.local>

docs/source/en/model_doc/conditional_detr.mdx

@@ -37,9 +37,10 @@ This model was contributed by [DepuMeng](https://huggingface.co/DepuMeng). The o
 [[autodoc]] ConditionalDetrFeatureExtractor
     - __call__
     - pad_and_create_pixel_mask
-    - post_process
-    - post_process_segmentation
-    - post_process_panoptic
+    - post_process_object_detection
+    - post_process_instance_segmentation
+    - post_process_semantic_segmentation
+    - post_process_panoptic_segmentation
 
 ## ConditionalDetrModel
 

docs/source/en/model_doc/deformable_detr.mdx

@@ -38,9 +38,7 @@ This model was contributed by [nielsr](https://huggingface.co/nielsr). The origi
 [[autodoc]] DeformableDetrFeatureExtractor
     - __call__
     - pad_and_create_pixel_mask
-    - post_process
-    - post_process_segmentation
-    - post_process_panoptic
+    - post_process_object_detection
 
 
 ## DeformableDetrConfig