Move tox jobs to CentOS Stream 9 in rdo-jobs repo

As part of the migration of automation jobs out of cs8 anc c7 because of
EOL we need to move jobs running in CS8 to CS9 nodes.

This patch is moving tox-linters and tox-docs to CS9 nodes.

pbr is not longer supporting build_sphinx so I am also moving out of pbr
to build docs in tox.ini.

Change-Id: I0dfedfb7d6c19c7f00f8c17af460f0c2c4b39d22

playbooks/rdo-tox-epel.yaml

@@ -2,7 +2,7 @@
   tasks:
     - name: Hacks for EPEL
       block:
-        - name: Install and enable EPEL for Centos-8
+        - name: Install and enable EPEL
           become: true
           shell: |
             set -euox pipefail
@@ -16,5 +16,4 @@
             name: re2-devel
             state: present
       when:
-        - ansible_distribution_major_version == "8"
         - ansible_distribution == "CentOS"

setup.cfg

@@ -10,9 +10,3 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-
-[build_sphinx]
-all-files = 1
-warning-is-error = 1
-source-dir = doc/source
-build-dir = doc/build

tox.ini

@@ -33,7 +33,7 @@ passenv =
 deps = -r{toxinidir}/test-requirements.txt
 
 [testenv:docs]
-commands = python setup.py build_sphinx
+commands = sphinx-build -W -b html doc/source doc/build/html {posargs}
 
 [testenv:venv]
 commands = {posargs}

zuul.d/projects.yaml

@@ -3,10 +3,9 @@
     check:
       jobs:
         - tox-docs: &cfg
-            nodeset: rdo-centos-8-stream
+            nodeset: rdo-centos-9-stream
             pre-run:
               - playbooks/rdo-tox-epel.yaml
-              - playbooks/pre-tox.yaml
         - tox-linters: *cfg
         - rdo-mol-container-login: &mol_container_login
             files: