Draft: Migration to Bookworm (replay of #1759)

[Salamandar]

cf YunoHost/issues#2050

Notes to test migration on a fresh VPS

Install a testing environment

## Install YunoHost
curl https://install.yunohost.org | bash -s -- -a
# Drink coffee
yunohost tools postinstall -d bullseye-bookworm-migration.test -u camille -F Camille -p Yunohost
# Sip more coffee

## Install your favorite apps, for example:
# Nextcloud (PHP+mysql)
yunohost app install nextcloud --args "domain=bullseye-bookworm-migration.test&path=/cloud&admin=camille&init_main_permission=visitors&user_home=true&system_addressbook_exposed=yes"
# Wekan (Nodejs + mongodb) 
yunohost app install wekan --args "domain=bullseye-bookworm-migration.test&path=/wekan&admin=camille&init_main_permission=visitors"
# Terraforming mars (nodejs+postgresql) Actually requires a few GB of RAM to npm build ? :|
# yunohost app install terraforming-mars --args "domain=bullseye-bookworm-migration.test&path=/tfm&init_main_permission=visitors"
# Coin (Python + postgresql)
yunohost domain add coin.bullseye-bookworm-migration.test
yunohost app install coin --args "domain=coin.bullseye-bookworm-migration.test&admin=camille&email=camille@example.tld&isp_name=YunoHost&isp_site=yunohost.org"

Run the actual migration

## Requirements for the migration
# Gotta make sure we get to unstable, because only unstable packages of yunohost 12.x are available now
sed -i 's/stable/stable testing unstable/g' /etc/apt/sources.list.d/yunohost.list
apt update
apt full-upgrade

# Manual apply of this pr
mv /usr/lib/python3/dist-packages/yunohost/migrations/0027_migrate_to_bookworm.py.disabled /usr/lib/python3/dist-packages/yunohost/migrations/0027_migrate_to_bookworm.py

# Validate the migration is there
yunohost tools migrations list --pending

# Run the migration from the command line (OR restart yunohost-api and run the migration from the webadmin?)
yunohost tools migrations run --accept-disclaimer --debug

# Here be dragons

[Salamandar]

Seems to be taking a huge time (4.5 minutes) on

/usr/bin/yunohost domain list --features mail_in mail_out --output-as json

But running yunohost domain list is pretty fast.

[Salamandar]

Looks like migration of Tandoor is completely broken.

Info: Updating apt...
Warning: E: Packages need to be removed but remove is disabled.
Warning: The following packages have unmet dependencies:
Warning:  libldap2-dev : Depends: libldap-dev but it is not going to be installed
Warning:  libpq-dev : Depends: libpq5 (= 15.7-0+deb12u1) but 16.3-1.pgdg110+1 is to be installed
Warning: Unable to install dependencies