Add python3-venv to autoinstall packages

[Copilot]

The late-commands section creates a Python venv via python3 -m venv, but python3-venv was absent from the packages list, causing installation failure with ensurepip is not available.

Change

• Added python3-venv to the packages list alongside python3-pip and python3-setuptools

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Autoinstall yaml needs an update</issue_title>
<issue_description>This is a log generated during the ubuntu instal, it seems python3-venv is missing from the .

Last part of the error log:

Mar 13 12:32:06 ubuntu subiquity_log.7294[73540]: * Get stickers, t-shirts, coffee mugs and more: https://commitgoods.com/collections/oh-my-zsh
Mar 13 12:32:06 ubuntu subiquity_log.7294[73540]: Run zsh to try it out.
Mar 13 12:32:06 ubuntu subiquity_event.7294[7294]: subiquity/Late/run/command_10: curtin in-target --target=/target -- bash -c "wget -qO- https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/ tools/install.sh | bash"
Mar 13 12:32:07 ubuntu subiquity_event.7294[7294]: subiquity/Late/run/command_11: curtin in-target --target=/target -- bash -c "wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/ install.sh | bash"
Mar 13 12:32:07 ubuntu subiquity_log.7294[7294]: running curtin in-target --target=/target -- bash -c "wget -qO-  https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash"
Mar 13 12:32:07 ubuntu subiquity_log.7294[73612]: => Downloading nvm from git to '/.nvm'
Mar 13 12:32:07 ubuntu subiquity_log.7294[73612]: [3B blob data]
Mar 13 12:32:07 ubuntu subiquity_log.7294[73619]: Cloning into '/.nvm'...
Mar 13 12:32:09 ubuntu subiquity_log.7294[73656]: * (HEAD detached at FETCH_HEAD)
Mar 13 12:32:09 ubuntu subiquity_log.7294[73656]: master
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: => Compressing and cleaning up git repository
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: => Profile not found. Tried ~/.bashrc, ~/.bash_profile, ~/.zprofile, ~/.zshrc, and ~/.profile.
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: => Create one of them and run this script again
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: OR
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: => Append the following lines to the correct file yourself:
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: export NVM_DIR="$HOME/.nvm"
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" #This loads nvm
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: => Close and reopen your terminal to start using nvm or run the following to use it now:
Mar 13 12:32:09 ubuntu subiquity_log.7294[73612]: [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" #This loads nvm
Mar 13 12:32:09 ubuntu subiquity_event.7294[7294]: subiquity/Late/run/command_11: curtin in-target --target=/target -- bash -c "wget -qO https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/ install.sh | bash"
Mar 13 12:32:09 ubuntu subiquity_event.7294[7294]: subiquity/Late/run/command_12: curtin in-target --target=/target -- bash -c ' python3 -m venv /target/root/b2-venv && source /target/root/b2-venv/bin/activate && pip install --upgrade pip && pip install b2'
Mar 13 12:32:09 ubuntu subiquity_log.7294[7294]: running curtin in-target --target=/target -- bash -c ' python3 -m venv /target/root/b2-venv && source /target/root/b2-venv/bin/activate && pip install --upgrade pip && pip install b2'
Mar 13 12:32:09 ubuntu subiquity_log.7294[73719]: The virtual environment was not created successfully because ensurepip is not
Mar 13 12:32:09 ubuntu subiquity_log.7294[73719]: available. On Debian/Ubuntu systems, you need to install the python3-venv
Mar 13 12:32:09 ubuntu subiquity_log.7294[73719]: package using the following command.
Mar 13 12:32:09 ubuntu subiquity_log.7294[73719]: apt install python3.12-venv
Mar 13 12:32:09 ubuntu subiquity_log.7294[73719]: You may need to use sudo with that command. After installing the python3-venv
Mar 13 12:32:09 ubuntu subiquity_log.7294[73719]: package, recreate your virtual environment.
Mar 13 12:32:09 ubuntu subiquity_log.7294[73719]: Failing command: /target/root/b2-venv/bin/python3
Mar 13 12:32:10 ubuntu subiquity_event.7294[7294]: subiquity/Late/run/command_12: Command ['systemd-cat', '--level-prefix=false', '--identifier=subiquity_log.7294', 'sh', '-c', "curtin in- target --target=/target -- bash -c ' python3 -m venv /target/root/b2-venv && source /target/root/b2-
venv/bin/activate && pip install --upgrade pip && pip install b2'"] returned non-zero exit status 1. Mar 13 12:32:10 ubuntu subiquity_event.7294[7294]: subiquity/Late/run/command_12: Command ['systemd-cat', '--level-prefix=false', '--identifier=subiquity_log.7294', 'sh', '-c', "curtin in-target --target=/target -- bash -c ' python3 -m venv /target/root/b2-venv && source /target/root/b2- venv/bin/activate && pip install --upgrade pip && pip install b2'"] returned non-zero exit status 1.
Mar 13 12:32:10 ubuntu subiquity_event. 7294[7294]:
```</issue_description>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Autoinstall yaml needs an update #55

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