Update CI for Dalmatian

Updates:
- added functional py312 testenv to tox.ini (not needed for unit
  tests)
- removed py38 classifier from setup.cfg, but did not change
  python_requires (currently it's >=3.8)
- run py311 func job in gate (was py310)

Change-Id: I661e397e597582404dcb33044844b7af7c64de5f

.zuul.yaml

@@ -28,13 +28,13 @@
       tox_envlist: functional-py39
 
 - job:
-    name: python-cinderclient-functional-py310
+    name: python-cinderclient-functional-py311
     parent: python-cinderclient-functional-base
-    # python 3.10 is the default in ubuntu 22.04 (jammy)
-    nodeset: openstack-single-node-jammy
+    # use debian bookworm, where py3.11 is the default
+    nodeset: devstack-single-node-debian-bookworm
     vars:
-      python_version: 3.10
-      tox_envlist: functional-py310
+      python_version: 3.11
+      tox_envlist: functional-py311
 
 - project:
     vars:
@@ -49,10 +49,10 @@
     check:
       jobs:
         - python-cinderclient-functional-py39
-        - python-cinderclient-functional-py310
+        - python-cinderclient-functional-py311
         - openstack-tox-pylint:
             voting: false
     gate:
       jobs:
         - python-cinderclient-functional-py39
-        - python-cinderclient-functional-py310
+        - python-cinderclient-functional-py311

setup.cfg

@@ -18,7 +18,6 @@ classifier =
     Programming Language :: Python
     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

tox.ini

@@ -107,7 +107,7 @@ setenv =
 # TLS (https) server certificate.
 passenv = OS_*
 
-[testenv:functional-py{3,38,39,310,311}]
+[testenv:functional-py{3,38,39,310,311,312}]
 deps = {[testenv:functional]deps}
 setenv = {[testenv:functional]setenv}
 passenv = {[testenv:functional]passenv}