Add Python3 project templates for 2023.1 Antelope release

TC has defined the python testing runtime[1] and this
commit defines the job template to be used for testing the
defined testing runtime for 2023.1 Antelope release[1].

This also defines openstack-python3-antelope-jobs-arm64 template
which is needed to continue the arm64 testing as n-v
for many projects like Nova, Cinder, Heat etc.

[1] https://review.opendev.org/c/openstack/governance/+/854375

Change-Id: Ieaeef87c88c285721ffdf2e40ca1c5465fcf7348

zuul.d/project-templates.yaml

@@ -500,6 +500,125 @@
             required-projects:
               - openstack/neutron
 
+- project-template:
+    name: openstack-python3-antelope-jobs
+    description: |
+      Runs unit tests for an OpenStack Python project under the CPython
+      version 3 releases designated for testing in the 2023.1 Antelope
+      release.
+    check:
+      jobs:
+        - openstack-tox-pep8
+        - openstack-tox-py39
+        - openstack-tox-py310
+    gate:
+      jobs:
+        - openstack-tox-pep8
+        - openstack-tox-py39
+        - openstack-tox-py310
+    post:
+      jobs:
+        - publish-openstack-python-branch-tarball
+
+- project-template:
+    name: openstack-python3-antelope-jobs-horizon
+    description: |
+      The standard :zuul:project_template:`openstack-python3-antelope-jobs`
+      but with horizon added as a required-projects. This checks out
+      the project code and allows tox_install_siblings to use horizon
+      when building the venv.
+    check:
+      jobs:
+        - openstack-tox-pep8:
+            required-projects:
+              - openstack/horizon
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/horizon
+        - openstack-tox-py310:
+            required-projects:
+              - openstack/horizon
+    gate:
+      jobs:
+        - openstack-tox-pep8:
+            required-projects:
+              - openstack/horizon
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/horizon
+        - openstack-tox-py310:
+            required-projects:
+              - openstack/horizon
+    post:
+      jobs:
+        - publish-openstack-python-branch-tarball
+
+- project-template:
+    name: openstack-python3-antelope-jobs-neutron
+    description: |
+      The standard :zuul:project_template:`openstack-python3-antelope-jobs`
+      but with neutron added as a required-projects. This checks out
+      the project code and allows tox_install_siblings to use neutron
+      when building the venv.
+    check:
+      jobs:
+        - openstack-tox-pep8:
+            required-projects:
+              - openstack/neutron
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/neutron
+        - openstack-tox-py310:
+            required-projects:
+              - openstack/neutron
+    gate:
+      jobs:
+        - openstack-tox-pep8:
+            required-projects:
+              - openstack/neutron
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/neutron
+        - openstack-tox-py310:
+            required-projects:
+              - openstack/neutron
+    post:
+      jobs:
+        - publish-openstack-python-branch-tarball
+
+- project-template:
+    name: openstack-python3-antelope-jobs-ceilometer
+    description: |
+      The standard :zuul:project_template:`openstack-python3-antelope-jobs`
+      but with ceilometer added as a required-projects. This checks out
+      the project code and allows tox_install_siblings to use ceilometer
+      when building the venv.
+    check:
+      jobs:
+        - openstack-tox-pep8:
+            required-projects:
+              - openstack/ceilometer
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/ceilometer
+        - openstack-tox-py310:
+            required-projects:
+              - openstack/ceilometer
+    gate:
+      jobs:
+        - openstack-tox-pep8:
+            required-projects:
+              - openstack/ceilometer
+        - openstack-tox-py39:
+            required-projects:
+              - openstack/ceilometer
+        - openstack-tox-py310:
+            required-projects:
+              - openstack/ceilometer
+    post:
+      jobs:
+        - publish-openstack-python-branch-tarball
+
 - project-template:
     name: openstack-python3-zed-jobs
     description: |
@@ -521,6 +640,21 @@
       jobs:
         - publish-openstack-python-branch-tarball
 
+- project-template:
+    name: openstack-python3-antelope-jobs-arm64
+    description: |
+      Runs unit tests for an OpenStack Python project under the CPython
+      version 3 releases designated for testing in the 2023.1 Antelope
+      release on top of ARM64 architecture. This currently runs only a
+      limited test set and supplements the python3-antelope-jobs.
+      And it should not be run instead of the default!
+    check-arm64:
+      jobs:
+        - openstack-tox-py39-arm64:
+            voting: false
+        - openstack-tox-py310-arm64:
+            voting: false
+
 - project-template:
     name: openstack-python3-zed-jobs-arm64
     description: |