Mask2former & Maskformer Fast Image Processor (#35685)

* add maskformerfast

* test

* revert do_reduce_labels and add testing

* make style & fix-copies

* add mask2former and make fix-copies
TO DO:
	add test for mask2former

* make fix-copies

* fill docstring

* enable mask2former fast processor

* python utils/custom_init_isort.py

* make fix-copies

* fix PR's comments

* modular file update

* add license

* make style

* modular file

* make fix-copies

* merge

* temp commit

* finish up maskformer mask2former

* remove zero shot examples

---------

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

docs/source/en/model_doc/mask2former.md

@@ -77,4 +77,12 @@ The resource should ideally demonstrate something new instead of duplicating an
     - encode_inputs
     - post_process_semantic_segmentation
     - post_process_instance_segmentation
+    - post_process_panoptic_segmentation
+
+## Mask2FormerImageProcessorFast
+
+[[autodoc]] Mask2FormerImageProcessorFast
+    - preprocess
+    - post_process_semantic_segmentation
+    - post_process_instance_segmentation
     - post_process_panoptic_segmentation

docs/source/en/model_doc/maskformer.md

@@ -76,6 +76,14 @@ This model was contributed by [francesco](https://huggingface.co/francesco). The
     - post_process_instance_segmentation
     - post_process_panoptic_segmentation
 
+## MaskFormerImageProcessorFast
+
+[[autodoc]] MaskFormerImageProcessorFast
+    - preprocess
+    - post_process_semantic_segmentation
+    - post_process_instance_segmentation
+    - post_process_panoptic_segmentation
+
 ## MaskFormerFeatureExtractor
 
 [[autodoc]] MaskFormerFeatureExtractor