python: Use Django 5.2 reverse(…, query=…).

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zproject/backends.py

@@ -19,7 +19,6 @@ from abc import ABC, abstractmethod
 from collections.abc import Callable
 from email.headerregistry import Address
 from typing import Any, TypedDict, TypeVar, cast
-from urllib.parse import urlencode
 
 import magic
 import orjson
@@ -88,7 +87,6 @@ from zerver.lib.request import RequestNotes
 from zerver.lib.sessions import delete_user_sessions
 from zerver.lib.subdomains import get_subdomain
 from zerver.lib.types import ProfileDataElementUpdateDict
-from zerver.lib.url_encoding import append_url_query_string
 from zerver.lib.users import check_full_name, validate_user_custom_profile_field
 from zerver.models import (
     CustomProfileField,
@@ -1637,9 +1635,8 @@ def redirect_to_login(realm: Realm) -> HttpResponseRedirect:
 def redirect_deactivated_user_to_login(realm: Realm, email: str) -> HttpResponseRedirect:
     # Specifying the template name makes sure that the user is not redirected to dev_login in case of
     # a deactivated account on a test server.
-    login_url = reverse("login_page", kwargs={"template_name": "zerver/login.html"})
-    redirect_url = append_url_query_string(
-        realm.url + login_url, urlencode({"is_deactivated": email})
+    redirect_url = realm.url + reverse(
+        "login_page", kwargs={"template_name": "zerver/login.html"}, query={"is_deactivated": email}
     )
     return HttpResponseRedirect(redirect_url)