Test python 3.12

As per 2025.1 testing runtime, Python 3.12 is the
max python version to test. Adding the test job
as well update the document to support it.

Also, remove the python_requires flag from setup.cfg
which stop installing it on python version lower
than the min supported. Let's allow to install and as
long as it work for older python it is ok. User can
get to know the supported python versions from
classifier also.

Change-Id: Ibd4ad33bdc30512568843358973c716b21d039de

doc/source/supported_version.rst

@@ -37,3 +37,4 @@ Tempest master supports the below python versions:
 * Python 3.9
 * Python 3.10
 * Python 3.11
+* Python 3.12

setup.cfg

@@ -6,7 +6,6 @@ description_file =
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
 home_page = https://docs.openstack.org/tempest/latest/
-python_requires = >=3.8
 classifier =
     Intended Audience :: Information Technology
     Intended Audience :: System Administrators
@@ -19,6 +18,7 @@ classifier =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: Implementation :: CPython
 

zuul.d/project.yaml

@@ -12,6 +12,7 @@
         - openstack-tox-py39
         - openstack-tox-py310
         - openstack-tox-py311
+        - openstack-tox-py312
         - tempest-full-py3:
             # Define list of irrelevant files to use everywhere else
             irrelevant-files: &tempest-irrelevant-files
@@ -130,6 +131,7 @@
         - openstack-tox-py39
         - openstack-tox-py310
         - openstack-tox-py311
+        - openstack-tox-py312
         - tempest-slow-py3:
             irrelevant-files: *tempest-irrelevant-files
         - neutron-ovs-grenade-multinode: