Add back pep8 and tarball jobs

Use the victoria python3 template to add py36, py38, pep8 and tarball
publishing back in.

Dependency added to fix ironic-python-agent-check-image-dib-centos8 job.

Depends-On: https://review.opendev.org/733794
Change-Id: I2a789dbfbdc3e0104fa9715dcfe5233453ccbf9c

.zuul.d/project.yaml

@@ -8,8 +8,7 @@
       # https://bugs.launchpad.net/tripleo/+bug/1879766
       - tripleo-buildimage-jobs-centos-8
       - openstack-python35-jobs
-      - openstack-python36-jobs
-      - openstack-python38-jobs
+      - openstack-python3-victoria-jobs
     check:
       jobs:
         - openstack-tox-pylint