Switch to Django 4.2.x from django-ex project for newer Pythons

[frenzymadness]

Django 4.2 LTS is still supported.

[frenzymadness]

[test]

[github-actions]

Testing Farm results

name	compose	arch	status	started (UTC)	time	logs
CentOS Stream 10 - 3.12-minimal	CentOS-Stream-10	x86_64	✅ passed	21.01.2025 08:59:49	14min 1s	test pipeline
CentOS Stream 9 - 3.12-minimal	CentOS-Stream-9	x86_64	✅ passed	21.01.2025 08:59:50	15min 32s	test pipeline
CentOS Stream 9 - 3.11-minimal	CentOS-Stream-9	x86_64	✅ passed	21.01.2025 08:59:45	15min 17s	test pipeline
CentOS Stream 10 - 3.12	CentOS-Stream-10	x86_64	✅ passed	21.01.2025 08:59:42	15min 58s	test pipeline
CentOS Stream 9 - 3.11	CentOS-Stream-9	x86_64	✅ passed	21.01.2025 08:59:41	16min 59s	test pipeline
CentOS Stream 9 - 3.12	CentOS-Stream-9	x86_64	✅ passed	21.01.2025 08:59:45	16min 46s	test pipeline
Fedora - 3.12-minimal	Fedora-latest	x86_64	✅ passed	21.01.2025 08:59:51	18min 14s	test pipeline
Fedora - 3.12	Fedora-latest	x86_64	✅ passed	21.01.2025 08:59:46	20min 32s	test pipeline
RHEL8 - 3.12-minimal	RHEL-8.10.0-Nightly	x86_64	✅ passed	21.01.2025 08:59:50	26min 54s	test pipeline
RHEL8 - 3.11-minimal	RHEL-8.10.0-Nightly	x86_64	✅ passed	21.01.2025 08:59:46	27min 18s	test pipeline
RHEL9 - 3.12	RHEL-9.4.0-Nightly	x86_64	✅ passed	21.01.2025 08:59:45	28min 15s	test pipeline
CentOS Stream 9 - 3.9	CentOS-Stream-9	x86_64	✅ passed	21.01.2025 09:11:30	16min 16s	test pipeline
RHEL9 - 3.11	RHEL-9.4.0-Nightly	x86_64	✅ passed	21.01.2025 08:59:45	28min 33s	test pipeline
RHEL8 - 3.9-minimal	RHEL-8.10.0-Nightly	x86_64	❌ error	21.01.2025 09:16:06	12min 52s	test pipeline
RHEL8 - 3.11	RHEL-8.10.0-Nightly	x86_64	✅ passed	21.01.2025 08:59:45	30min 33s	test pipeline
CentOS Stream 9 - 3.9-minimal	CentOS-Stream-9	x86_64	✅ passed	21.01.2025 09:15:57	14min 55s	test pipeline
RHEL8 - 3.12	RHEL-8.10.0-Nightly	x86_64	✅ passed	21.01.2025 08:59:42	31min 56s	test pipeline
Fedora - 3.13	Fedora-latest	x86_64	✅ passed	21.01.2025 09:10:52	21min	test pipeline
RHEL9 - 3.9	RHEL-9.4.0-Nightly	x86_64	✅ passed	21.01.2025 09:14:34	27min 48s	test pipeline
RHEL8 - 3.9	RHEL-8.10.0-Nightly	x86_64	✅ passed	21.01.2025 09:15:41	29min 41s	test pipeline

[frenzymadness]

The failure of RHEL8 - 3.9-minimal does not seem to be related to this change.