add fast image processor nougat (#37661)

* add fast image processor nougat

* test fixes

* docstring white space

* last fixes

* docstring_type

* tolerance unit test

* fix tolerance

* fix rtol

* remove traling white space

* remove white space

* note for tolerance unit test

* fix tests

* remove print

---------

Co-authored-by: yonigozlan <yoni.gozlan@huggingface.co>
Co-authored-by: Yoni Gozlan <74535834+yonigozlan@users.noreply.github.com>

docs/source/en/model_doc/nougat.md

@@ -107,6 +107,11 @@ The model is identical to [Donut](donut) in terms of architecture.
 [[autodoc]] NougatImageProcessor
     - preprocess
 
+## NougatImageProcessorFast
+
+[[autodoc]] NougatImageProcessorFast
+    - preprocess
+
 ## NougatTokenizerFast
 
 [[autodoc]] NougatTokenizerFast