Move upper functional job to py312

Python 3.12 is now the maximum supported version.

Change-Id: I2e332c098c944bcbfa3b0d24e6a0bbf6dd5ba0d3

.zuul.yaml

@@ -16,7 +16,7 @@
     check:
       jobs:
         - openstack-tox-functional-py39
-        - openstack-tox-functional-py311
+        - openstack-tox-functional-py312
         - openstack-tox-pep8
         - placement-nova-tox-functional-py39
         - placement-nested-perfload:
@@ -49,7 +49,7 @@
     gate:
       jobs:
         - openstack-tox-functional-py39
-        - openstack-tox-functional-py311
+        - openstack-tox-functional-py312
         - openstack-tox-pep8
         - placement-nova-tox-functional-py39
         - tempest-integrated-placement:

setup.cfg

@@ -24,10 +24,10 @@ classifier =
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
 
 [files]
 packages =