Fixes after security review 2023 (#3576)

.test_durations

docs/setup/administrators/configuration.md

hypha/apply/activity/adapters/slack.py

hypha/apply/activity/views.py

hypha/apply/api/v1/views.py

hypha/apply/funds/models/applications.py

hypha/apply/users/forms.py

hypha/apply/users/templates/elevate/elevate.html

...users/templates/users/email_change/update_info_email.html

hypha/apply/users/tests/test_forms.py

hypha/apply/users/urls.py

hypha/apply/users/views.py

hypha/settings/base.py

hypha/settings/django.py

hypha/settings/test.py

requirements.txt