returns a string with the system's current default python version, for example 'python311'
returns an array of strings with all the available python versions in the repository, we can get the latest version with parameter defined
given a python package version, e.g. python311, returns the executable name python3.11 when the package is 'python3', return the system default one (eg python3.6 for SLE15.4)
remove all the installed available python versions