[Task]: Update python to 3.12

[eviljeff]

Description

Python 3.13 was released last week, and 3.12 is a year old, so it's plenty mature enough to upgrade to. https://www.python.org/downloads/release/python-3127/ is the latest maintenance release at this point.

Acceptance Criteria

Milestones/checkpoints

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1. addons-server runs python 3.12

Checks

• If I have identified that the work is specific to a repository, I have removed "repository:addons-server" or "repository:addons-frontend"

[alexandruschek]

Hello,

I did a check on -DEV environment thought the automated suite and also manual checks and everything looks ok.

Thank you!