core: applications backchannel provider (#5449)

* backchannel applications

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* add webui

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* include assigned app in provider

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* improve backchannel provider list display

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* make ldap provider compatible

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* show backchannel providers in app view

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* make backchannel required for SCIM

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* cleanup api

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* update docs

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix tests

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* Apply suggestions from code review

Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>
Signed-off-by: Jens L. <jens@beryju.org>

* update docs

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>
Signed-off-by: Jens L. <jens@beryju.org>
Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>

authentik/core/tests/test_models.py

@@ -53,9 +53,8 @@ def provider_tester_factory(test_model: type[Stage]) -> Callable:
     def tester(self: TestModels):
         model_class = None
         if test_model._meta.abstract:  # pragma: no cover
-            model_class = test_model.__bases__[0]()
-        else:
-            model_class = test_model()
+            return
+        model_class = test_model()
         self.assertIsNotNone(model_class.component)
 
     return tester