5428: Replace distutils with setuptools

[Delizald]

Fixes #5428

Description of the Change
Replaces distutils library with setuptools for Python3

Alternate Designs

Release Notes

[Delizald]

Looks like there's more distutil references

[AenBleidd]

Could you please replace those as well?

[davidpanderson]

The important pieces of Python code are tools/make_project and sched/start.

We need to decide whether to use exclusively Python3.
I'd be fine with this, although it might inconvenience projects running on old servers.

BTW, (although I ike Python) the use of Python in BOINC is old and messy;
for example, the path_config.py kludge (see py/Boinc).
At one point I converted 'update_versions' from Python to PHP
and it was much shorter and simpler.
We could do the same for make_project and start.