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/model_debugging_utils.py

@@ -20,7 +20,7 @@ import re
 from contextlib import contextmanager
 from typing import Optional
 
-from transformers.utils.import_utils import export
+from transformers.utils.import_utils import requires
 
 from .utils import is_torch_available
 
@@ -225,7 +225,7 @@ def _attach_debugger_logic(model, class_name, debug_path: str):
             break  # exit the loop after finding one (unsure, but should be just one call.)
 
 
-@export(backends=("torch",))
+@requires(backends=("torch",))
 def model_addition_debugger(cls):
     """
     # Model addition debugger - a model adder tracer
@@ -282,7 +282,7 @@ def model_addition_debugger(cls):
     return cls
 
 
-@export(backends=("torch",))
+@requires(backends=("torch",))
 @contextmanager
 def model_addition_debugger_context(model, debug_path: Optional[str] = None):
     """