Fixed #34303 –- Allowed customizing admin site log entry list.

Added AdminSite.get_log_entries() as an override point and made this
available to the template via each_context().

tests/admin_utils/urls.py

@@ -1,7 +1,8 @@
 from django.urls import path
 
-from .admin import site
+from .admin import custom_site, site
 
 urlpatterns = [
     path("test_admin/admin/", site.urls),
+    path("test_admin/custom_admin/", custom_site.urls),
 ]