core: bump django from 4.1.7 to 4.2 (#5151)

* core: bump django from 4.1.7 to 4.2

Bumps [django](https://github.com/django/django) from 4.1.7 to 4.2.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/4.1.7...4.2)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* upgrade to psycopg3, use custom engine for prometheus metrics

See https://github.com/korfuri/django-prometheus/issues/350

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

* make scripts use pscopg3

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

---------

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Jens Langhammer <jens@goauthentik.io>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jens Langhammer <jens@goauthentik.io>

authentik/root/settings.py

@@ -270,7 +270,7 @@ CHANNEL_LAYERS = {
 
 DATABASES = {
     "default": {
-        "ENGINE": "django_prometheus.db.backends.postgresql",
+        "ENGINE": "authentik.root.db_engine",
         "HOST": CONFIG.y("postgresql.host"),
         "NAME": CONFIG.y("postgresql.name"),
         "USER": CONFIG.y("postgresql.user"),