Simplify soft dependencies and update the dummy-creation process (#36827)

* Reverse dependency map shouldn't be created when test_all is set

* [test_all] Remove dummies

* Modular fixes

* Update utils/check_repo.py

Co-authored-by: Pablo Montalvo <39954772+molbap@users.noreply.github.com>

* [test_all] Better docs

* [test_all] Update src/transformers/commands/chat.py

Co-authored-by: Joao Gante <joaofranciscocardosogante@gmail.com>

* [test_all] Remove deprecated AdaptiveEmbeddings from the tests

* [test_all] Doc builder

* [test_all] is_dummy

* [test_all] Import utils

* [test_all] Doc building should not require all deps

---------

Co-authored-by: Pablo Montalvo <39954772+molbap@users.noreply.github.com>
Co-authored-by: Joao Gante <joaofranciscocardosogante@gmail.com>

src/transformers/image_processing_utils_fast.py

@@ -68,6 +68,8 @@ if is_torchvision_available():
         from torchvision.transforms.v2 import functional as F
     else:
         from torchvision.transforms import functional as F
+else:
+    pil_torch_interpolation_mapping = None
 
 logger = logging.get_logger(__name__)