providers: add preview for mappings (#4254)

* preview

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* web/admin: show provider page on application page

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* use oauth2 end session url instead of direct interface

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* dont show provider page on application page for now

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* add UI for preview

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* translate and release notes

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* fix lint

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* separate saml api files

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* add api tests

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

tests/e2e/test_provider_oauth2_grafana.py

@@ -57,7 +57,7 @@ class TestProviderOAuth2OAuth(SeleniumTestCase):
                 "GF_AUTH_GENERIC_OAUTH_API_URL": (self.url("authentik_providers_oauth2:userinfo")),
                 "GF_AUTH_SIGNOUT_REDIRECT_URL": (
                     self.url(
-                        "authentik_core:if-session-end",
+                        "authentik_providers_oauth2:end-session",
                         application_slug=self.app_slug,
                     )
                 ),