Ubuntu set the default python version

- Ubuntu set default python version
- Ubuntu set default python version to 3.10
- Ubuntu set default python version to 3.8
- Ubuntu set default python version to 3.9
- Ubuntu set default python version to 3.12
- Ubuntu set default python version to 3.11
- Ubuntu 22.04 set default python version
- Ubuntu 20.04 set default python version
- Ubuntu 22 set default python version
- Ubuntu 18.04 set default python version