T5124: Python3 deprecation distutils

[HollyGurza]

Change Summary

By https://peps.python.org/pep-0632/

For these modules or functions, use the standard library module shown:

distutils.fancy_getopt — use the argparse module
distutils.spawn.find_executable — use the shutil.which function
distutils.spawn.spawn — use the subprocess.run function
distutils.sysconfig — use the sysconfig module
distutils.util.get_platform — use the platform module

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T5124

Component(s) name

Proposed changes

How to test

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[dmbaturin]

Thanks! I hope there are no unexpected behavior differences between distutils's find_executable() and shutil.which().