Fix tox4 error

Remove skipsdist that it was never supported and causes breakage
when used with usedevelop.

Also move to generic openstack test template.

Change-Id: Ie231aa8f574f882bb3879efcda2363a012e67caf

tox.ini

@@ -1,7 +1,6 @@
 [tox]
 minversion = 3.18.0
 envlist = py3,pep8
-skipsdist = True
 ignore_basepython_conflict=true
 
 [testenv]

zuul.d/project.yaml

@@ -1,7 +1,7 @@
 - project:
     templates:
       - check-requirements
-      - openstack-python3-zed-jobs
+      - openstack-python3-jobs
       - publish-openstack-docs-pti
       - release-notes-jobs-python3
     check: