tests/e2e: add forward auth e2e test (#11374)

* add nginx forward_auth e2e tests

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

* add envoy

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

* cleanup

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

* remove even more duplicate code

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

* cleanup more

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

* add traefik static config

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

* more cleanup, don't generate dex config cause they support env variables

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

* use default dex entrypoint to use templating

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

* remove options that are always set as default

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

* fix

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

* fix compose flag

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

* add caddy

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

* merge python files

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

* use whoami api to check better

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

* fix envoy config

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

* set invalidation flow

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

* fix logout checks

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

---------

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

tests/e2e/sources_oauth2_dex/dex.yaml

@@ -0,0 +1,23 @@
+---
+enablePasswordDB: true
+issuer: http://127.0.0.1:5556/dex
+logger:
+  level: debug
+staticClients:
+  - id: example-app
+    name: Example App
+    redirectURIs:
+      - {{ .Env.AK_REDIRECT_URL }}
+    secret: {{ .Env.AK_CLIENT_SECRET }}
+staticPasswords:
+  - email: admin@example.com
+    # hash for 'password', for testing
+    hash: "$2a$10$2b2cU8CPhOTaGrs1HRQuAueS7JTT5ZHsHSzYiFPm1leZck7Mc8T4W"
+    userID: "08a8684b-db88-4b73-90a9-3cd1661f5466"
+    username: admin
+storage:
+  config:
+    file: "/tmp/dex.db"
+  type: sqlite3
+web:
+  http: 0.0.0.0:5556