Grow a new API for enabling/disabling systemd experimental support. We
do this by chaining a specific command= in the boot section.
We preserve the user customized command= content when systemd
experimental support is not enabled.
Co-authored-by: Jean-Baptiste Lallement <jean-baptiste@ubuntu.com>
1. rebase with main and update autoinstall-system-setup.yml
2. provide a more unified indent style
3. update get_userandgroups() to the dropped one
4. fix the problematic os action
5. simply asignments
6. assign default_loader a default value
7. provide a type-to-file dict in wsl_conf
8. provide stderr info when providing error in creating user
9. update schema and example files