Added publish-openstack-python-tarball job

It will be used for publishing tarballs to
tarballs.opendev.org only for python projects.

It will be triggered in release pipeline.

It is needed by tripleo-operator-ansible.

Needed-By: https://review.opendev.org/c/openstack/tripleo-operator-ansible/+/791645

Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: Ifd84cbe9bca856547efc2939a744ef068c286d36

zuul.d/jobs.yaml

@@ -63,6 +63,22 @@
       - setup.py
       - README.rst
 
+- job:
+    name: publish-openstack-python-tarball
+    parent: publish-openstack-artifacts
+    description: |
+      Release and sign OpenStack python tarballs to tarballs.o.o.
+      It is similar to release-openstack-python but
+      omits PyPI publication.
+    pre-run: playbooks/pti-python-tarball/pre.yaml
+    run: playbooks/pti-python-tarball/run.yaml
+    post-run:
+      - playbooks/pti-python-tarball/post.yaml
+    secrets:
+      - gpg_key
+    vars:
+      release_python: python3
+
 - job:
     name: publish-openstack-sphinx-docs-base
     nodeset: ubuntu-xenial