Fix issues related to py312 compatibility

Summary of changes:
- Remove pinnings for pip, virtualenv, setuptools
- Add py312 section to tox.ini [testenv]
- Removed test dependency on retired sunbeam-ops repo
- Updated zuul.yaml to use openstack-python3-charm-jobs

Change-Id: I289118ce34583e511c52847613a2bd2694d45ae3

.zuul.yaml

@@ -1,5 +1,5 @@
 - project:
     templates:
-      - openstack-python3-charm-yoga-jobs
+      - openstack-python3-charm-jobs
       - openstack-cover-jobs
 

test-requirements.txt

@@ -5,6 +5,5 @@ git+https://github.com/openstack-charmers/zaza.git#egg=zaza
 git+https://github.com/openstack-charmers/zaza-openstack-tests.git#egg=zaza.openstack
 requests-mock
 ripdb
-git+https://github.com/openstack/charm-ops-sunbeam.git
 mock
 git+https://opendev.org/openstack/charm-ops-openstack@master#egg=ops_openstack

tox.ini

@@ -7,21 +7,6 @@ skipsdist = True
 sitepackages = False
 # NOTE: Avoid false positives by not skipping missing interpreters.
 skip_missing_interpreters = False
-# NOTES:
-# * We avoid the new dependency resolver by pinning pip < 20.3, see
-#   https://github.com/pypa/pip/issues/9187
-# * Pinning dependencies requires tox >= 3.2.0, see
-#   https://tox.readthedocs.io/en/latest/config.html#conf-requires
-# * It is also necessary to pin virtualenv as a newer virtualenv would still
-#   lead to fetching the latest pip in the func* tox targets, see
-#   https://stackoverflow.com/a/38133283
-# * It is necessary to declare setuptools as a dependency otherwise tox will
-#   fail very early at not being able to load it. The version pinning is in
-#   line with `pip.sh`.
-requires = pip < 20.3
-           virtualenv < 20.0
-           setuptools < 50.0.0
-# NOTE: https://wiki.canonical.com/engineering/OpenStack/InstallLatestToxOnOsci
 minversion = 3.2.0
 
 [testenv]
@@ -36,7 +21,7 @@ allowlist_externals =
     bash
     charmcraft
     rename.sh
-passenv = HOME TERM CS_* OS_* TEST_*
+passenv = HOME, TERM, CS_*, OS_*, TEST_*
 deps = -r{toxinidir}/test-requirements.txt
 
 [testenv:py38]
@@ -54,6 +39,11 @@ basepython = python3.10
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
+[testenv:py312]
+basepython = python3.12
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
+
 [testenv:py3]
 basepython = python3
 deps = -r{toxinidir}/requirements.txt