*: Switch consumers over to Django 4.2

[kai]

Summary

Django 3.2 become End-of-Life during April 2024 and Django 4.2 is the
new LTS (= Long Term Support) release which will be supported until
April 2026.

* Switch the most ports that use www/py-django32 to www/py-django42

* Ports that are not compatible with Django 3.2 have already been set
  with an expiration date were not taken into account.

* Bump PORTREVISION due dependency change where necessary.

Test Plan

• poudriere -> OK (13.2-RELEASE amd64)
• make index -> OK
• As soon as this diff is committed (ETA around the end of April), the next step is to switch the consumer that are still using the py-dj42-* ports accordingly.

[grembo]

Parts that affect me look good

[ultima]

Same, Seahub supports Django 4.2 along with the other depends under my care.

[dvl]

I'm working in-house to get the devs to confirm security/py-first-server is good with Django 4.2

[kai]

Committed, thank you for your time and feedback, @dvl , @grembo and @ultima!