Add SiglipForImageClassification and CLIPForImageClassification (#28952)

* First draft

* Add CLIPForImageClassification

* Remove scripts

* Fix doctests

docs/source/en/model_doc/clip.md

@@ -172,6 +172,11 @@ The resource should ideally demonstrate something new instead of duplicating an
 [[autodoc]] CLIPVisionModel
     - forward
 
+## CLIPForImageClassification
+
+[[autodoc]] CLIPForImageClassification
+    - forward
+
 </pt>
 <tf>
 

docs/source/en/model_doc/siglip.md

@@ -140,3 +140,9 @@ If you want to do the pre- and postprocessing yourself, here's how to do that:
 
 [[autodoc]] SiglipVisionModel
     - forward
+
+
+## SiglipForImageClassification
+
+[[autodoc]] SiglipForImageClassification
+    - forward