Add templates for additional charm stable branches

Define py3* job templates, and update pep8 and cover
job definition regexes for the stable branches that use
the names like stable/ussuri, etc.

Change-Id: I50a22c0a56c4e4c1d8229ef4769bfa00734e478a

zuul.d/jobs.yaml

@@ -28,6 +28,7 @@
       Uses tox with the ``pep8`` environment.
     branches:
       - ^.*/focal
+      - ^.*/ussuri
 
 - job:
     name: openstack-tox-pep8-charm-jammy
@@ -39,6 +40,8 @@
       Uses tox with the ``pep8`` environment.
     branches:
       - ^.*/jammy
+      - ^.*/yoga
+      - ^.*/2024.1
 
 - job:
     name: openstack-tox-pep8-charm-noble

zuul.d/project-templates.yaml

@@ -77,9 +77,63 @@
         - openstack-tox-cover-charm-focal:
             branches:
               - stable/focal
+              - stable/ussuri
         - openstack-tox-cover-charm-jammy:
             branches:
               - stable/jammy
+              - stable/yoga
+              - stable/2024.1
         - openstack-tox-cover-charm-noble:
             branches:
               - stable/noble
+
+- project-template:
+    name: openstack-python3-charm-jobs-ussuri
+    description: |
+      Runs unit tests for an OpenStack Charm project under the CPython
+      version 3 releases designated for testing across OpenStack
+      releases on Ussuri stable branches.
+    check:
+      jobs:
+        - openstack-tox-pep8-charm-focal
+        - openstack-tox-py36
+        - openstack-tox-py37
+        - openstack-tox-py38:
+            voting: false
+    gate:
+      jobs:
+        - openstack-tox-pep8-charm-focal
+        - openstack-tox-py36
+        - openstack-tox-py37
+
+- project-template:
+    name: openstack-python3-charm-jobs-yoga
+    description: |
+      Runs unit tests for an OpenStack Charm project under the CPython
+      version 3 releases designated for testing across OpenStack
+      releases on Yoga stable branches.
+    check:
+      jobs:
+        - openstack-tox-pep8-charm-jammy
+        - openstack-tox-py38
+        - openstack-tox-py310:
+            voting: false
+    gate:
+      jobs:
+        - openstack-tox-pep8-charm-jammy
+        - openstack-tox-py38
+
+- project-template:
+    name: openstack-python3-charm-jobs-2024.1
+    description: |
+      Runs unit tests for an OpenStack Charm project under the CPython
+      version 3 releases designated for testing across OpenStack
+      releases on 2024.1 stable branches.
+    check:
+      jobs:
+        - openstack-tox-pep8-charm-jammy
+        - openstack-tox-py310
+    gate:
+      jobs:
+        - openstack-tox-pep8-charm-jammy
+        - openstack-tox-py310