epic: Upgrade to Ubuntu 24.04.03 LTS

[KoenDR06]

This PR upgrades our servers to Ubuntu 24.04.03 LTS. Below is a list of the
changes made, since it affects quite a few files.

README

The README is out-of-date in several places. I updated it in the places that were
relevant to this PR, but we should update the entire thing. I created #521 to address this.

ansible/deploy.py

Made it so that when you do not pass --roles, --from or --until it sends
the string "All" to discord instead of the empty string.

Role vars/

Ubuntu 24 has some subtle changes to the way user home creations are handled.
No roles make a user home, they explicitly add it. If this is not done, nginx
does not have the correct permissions to access websites' files, making it so
that websites do not work entirely.

Put user homes in variables to avoid hardcoding.

The following roles are affected by this:

• aas
• chroma
• cray88bot
• digidecs
• intro_website
• mongoose
• outline
• radio
• rooster
• pretix

AWS Console

On Ubuntu 24.04, the apt package awscli does not exist anymore. It has been
moved to snap. There were also some roles that used awscli but depended on
other roles installing it. They now explicitly install it.

Pretix

Python versions have been updated to 3.12. Silas and I think we should look
into moving pretix to uv for consistency with other projects.

The role previously depended on the venv already existing, added a check to
see if it does.

Ubuntu 24 no longer has awscli in apt. It has been moved to snap. Some roles
depended on other roles installing it. They now explicitly install it.

[SilasPeters]

I see this review has never been submitted, whoops. DOn't know if it is outdated, but I need to do other thigns now.

[SilasPeters]

Don't merge just yet

[SilasPeters]

Actually we should first try to minimize the harbor removal, move it to a new branch or something, or try removing it simply from main.yml