Add Document Image Transformer (DiT) (#15984)

* Add conversion script

* Improve script

* Fix bug

* Add option to push to hub

* Add support for classification models

* Update model name

* Upload feature extractor files first

* Remove hash checking

* Fix config

* Add id2label

* Add import

* Fix id2label file name

* Fix expected shape

* Add model to README

* Improve docs

* Add integration test and fix CI

* Fix code style

* Add missing init

* Add model to SPECIAL_MODULE_TO_TEST_MAP

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

utils/tests_fetcher.py

@@ -276,6 +276,7 @@ SPECIAL_MODULE_TO_TEST_MAP = {
         "auto/test_modeling_auto.py",
         "auto/test_modeling_tf_pytorch.py",
         "bort/test_modeling_bort.py",
+        "dit/test_modeling_dit.py",
     ],
     "models/auto/modeling_flax_auto.py": "auto/test_modeling_flax_auto.py",
     "models/auto/modeling_tf_auto.py": [