Python 3.8 Support

[s0undt3ch]

Description of Issue

Support Python 3.8

Arch Linux updated to python 3.8 and one of the tests upgrades the system, which means, while the test suite runs, we upgrade from 3.7 to 3.8, thus failing at the very end.

https://jenkinsci.saltstack.com/job/pr-kitchen-archlts-py3/job/PR-55276/4/

Current stopgap: #55309

[s0undt3ch]

Problematic code:

• from platform import _supported_dists

[Ch3LL]

• Need to have a running list of deprecation's which will affect Salt, for example: abc from collections in Py 3.8. Plan to have public list in GitHub ? where contributors / Salt can add to the list and generate Issues such that Salt can be updated.

[Ikke]

For Alpine, the lack of python3.8 support prevents salt-minion from running, so this is not just a test failure, but actual run-time errors:

$ salt-minion
Traceback (most recent call last):
[..]
  File "/usr/lib/python3.8/site-packages/salt/grains/core.py", line 40, in <module>
    from platform import _supported_dists
ImportError: cannot import name '_supported_dists' from 'platform' (/usr/lib/python3.8/platform.py)

[itamarjp]

Python 3.8 will land fedora soon. (already there for Fedora 32)
https://koji.fedoraproject.org/koji/packageinfo?packageID=9781

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

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