root: extract custom setup code (#15150)

manage.py

@@ -1,35 +1,18 @@
 #!/usr/bin/env python
 """Django manage.py"""
+
 import os
 import sys
-import warnings
 
-from authentik.lib.config import CONFIG
-from cryptography.hazmat.backends.openssl.backend import backend
-from defusedxml import defuse_stdlib
 from django.utils.autoreload import DJANGO_AUTORELOAD_ENV
 
+from authentik.root.setup import setup
 from lifecycle.migrate import run_migrations
 from lifecycle.wait_for_db import wait_for_db
 
-warnings.filterwarnings("ignore", "SelectableGroups dict interface")
-warnings.filterwarnings(
-    "ignore",
-    "defusedxml.lxml is no longer supported and will be removed in a future release.",
-)
-warnings.filterwarnings(
-    "ignore",
-    "defusedxml.cElementTree is deprecated, import from defusedxml.ElementTree instead.",
-)
-
-defuse_stdlib()
-
-if CONFIG.get_bool("compliance.fips.enabled", False):
-    backend._enable_fips()
-
+setup()
 
 if __name__ == "__main__":
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "authentik.root.settings")
     wait_for_db()
     if (
         len(sys.argv) > 1