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>

tests/utils/import_structures/failing_export.py

@@ -14,10 +14,10 @@
 
 # fmt: off
 
-from transformers.utils.import_utils import export
+from transformers.utils.import_utils import requires
 
 
-@export(backends=("random_item_that_should_not_exist",))
+@requires(backends=("random_item_that_should_not_exist",))
 class A0:
     def __init__(self):
         pass

tests/utils/import_structures/import_structure_raw_register.py

@@ -14,32 +14,32 @@
 
 # fmt: off
 
-from transformers.utils.import_utils import export
+from transformers.utils.import_utils import requires
 
 
-@export()
+@requires()
 class A0:
     def __init__(self):
         pass
 
 
-@export()
+@requires()
 def a0():
     pass
 
 
-@export(backends=("torch", "tf"))
+@requires(backends=("torch", "tf"))
 class A1:
     def __init__(self):
         pass
 
 
-@export(backends=("torch", "tf"))
+@requires(backends=("torch", "tf"))
 def a1():
     pass
 
 
-@export(
+@requires(
     backends=("torch", "tf")
 )
 class A2:
@@ -47,14 +47,14 @@ class A2:
         pass
 
 
-@export(
+@requires(
     backends=("torch", "tf")
 )
 def a2():
     pass
 
 
-@export(
+@requires(
     backends=(
         "torch",
         "tf"
@@ -65,7 +65,7 @@ class A3:
         pass
 
 
-@export(
+@requires(
     backends=(
             "torch",
             "tf"
@@ -74,7 +74,7 @@ class A3:
 def a3():
     pass
 
-@export(backends=())
+@requires(backends=())
 class A4:
     def __init__(self):
         pass

tests/utils/import_structures/import_structure_register_with_comments.py

@@ -14,49 +14,49 @@
 
 # fmt: off
 
-from transformers.utils.import_utils import export
+from transformers.utils.import_utils import requires
 
 
-@export()
+@requires()
 # That's a statement
 class B0:
     def __init__(self):
         pass
 
 
-@export()
+@requires()
 # That's a statement
 def b0():
     pass
 
 
-@export(backends=("torch", "tf"))
+@requires(backends=("torch", "tf"))
 # That's a statement
 class B1:
     def __init__(self):
         pass
 
 
-@export(backends=("torch", "tf"))
+@requires(backends=("torch", "tf"))
 # That's a statement
 def b1():
     pass
 
 
-@export(backends=("torch", "tf"))
+@requires(backends=("torch", "tf"))
 # That's a statement
 class B2:
     def __init__(self):
         pass
 
 
-@export(backends=("torch", "tf"))
+@requires(backends=("torch", "tf"))
 # That's a statement
 def b2():
     pass
 
 
-@export(
+@requires(
     backends=(
         "torch",
         "tf"
@@ -68,7 +68,7 @@ class B3:
         pass
 
 
-@export(
+@requires(
     backends=(
         "torch",
         "tf"

tests/utils/import_structures/import_structure_register_with_duplicates.py

@@ -14,47 +14,47 @@
 
 # fmt: off
 
-from transformers.utils.import_utils import export
+from transformers.utils.import_utils import requires
 
 
-@export(backends=("torch", "torch"))
+@requires(backends=("torch", "torch"))
 class C0:
     def __init__(self):
         pass
 
 
-@export(backends=("torch", "torch"))
+@requires(backends=("torch", "torch"))
 def c0():
     pass
 
 
-@export(backends=("torch", "torch"))
+@requires(backends=("torch", "torch"))
 # That's a statement
 class C1:
     def __init__(self):
         pass
 
 
-@export(backends=("torch", "torch"))
+@requires(backends=("torch", "torch"))
 # That's a statement
 def c1():
     pass
 
 
-@export(backends=("torch", "torch"))
+@requires(backends=("torch", "torch"))
 # That's a statement
 class C2:
     def __init__(self):
         pass
 
 
-@export(backends=("torch", "torch"))
+@requires(backends=("torch", "torch"))
 # That's a statement
 def c2():
     pass
 
 
-@export(
+@requires(
     backends=(
         "torch",
         "torch"
@@ -66,7 +66,7 @@ class C3:
         pass
 
 
-@export(
+@requires(
     backends=(
         "torch",
         "torch"