Pin Sphinx version and update Ubuntu Focal nodes to Jammy

Unfortunately this patch has to include two unrelated changes, otherwise
jobs fail and separate patches could not be merged.

Sphinx version needs to be pinned to 4.4.0 (or earlier), because new
version 7.0.0 causes some issues.

Due to recent changes in devstack-plugin-ceph, the
devstack-tobiko-storage-ceph job failed with ubuntu focal nodes, so its
nodeset has to be modified to use jammy instead.
This patch also updates to ubuntu jammy other jobs that pass with those
nodes. However, some other tobiko jobs need to keep on using ubuntu
focal: more specifically, those jobs running scenario tests on Ubuntu
VM instances fail with jammy nodes.

Change-Id: I955beb104db24377a697b1bccad66ab14fe66568

.pre-commit-config.yaml

@@ -19,7 +19,7 @@ repos:
       - id: trailing-whitespace
 
   - repo: https://github.com/adrienverge/yamllint.git
-    rev: v1.29.0
+    rev: v1.31.0
     hooks:
       - id: yamllint
         files: \.(yaml|yml)$

doc/requirements.txt

@@ -5,5 +5,5 @@
 # As openstack job build-reno-releasenotes and Read The Docs page support only
 # one single requirements file for a project, we need to have one such file
 # which will include all project requirements
-sphinx>=3.4.2                 # BSD
+sphinx>=3.4.2,<=4.4.0         # BSD
 sphinx_rtd_theme>=0.5.1,<1    # Apache-2.0

zuul.d/devstack-tobiko-designate.yaml

@@ -20,6 +20,7 @@
 - job:
     name: devstack-tobiko-designate
     parent: devstack-tobiko-minimal
+    nodeset: devstack-tobiko-focal
     voting: true
     required-projects: &REQUIRED_PROJECTS
       - opendev.org/openstack/designate

zuul.d/devstack-tobiko-heat.yaml

@@ -15,6 +15,7 @@
 - job:
     name: devstack-tobiko-heat
     parent: devstack-tobiko-minimal
+    nodeset: devstack-tobiko-focal
     required-projects:
       - openstack/heat
     voting: true

zuul.d/devstack-tobiko-minimal.yaml

@@ -17,7 +17,7 @@
     abstract: false
     name: devstack-tobiko-minimal
     parent: devstack
-    nodeset: devstack-tobiko
+    nodeset: devstack-tobiko-jammy
     voting: true
     description: |
       Minimal Devstack Tobiko Plugin job.

zuul.d/devstack-tobiko.yaml

@@ -20,7 +20,7 @@
     abstract: false
     name: devstack-tobiko
     parent: devstack-tobiko-minimal
-    nodeset: devstack-tobiko
+    nodeset: devstack-tobiko-focal
     voting: true
     description: |
       Base Devstack Tobiko Plugin job.

zuul.d/nodesets.yaml

@@ -1,7 +1,7 @@
 ---
 
 - nodeset:
-    name: devstack-tobiko
+    name: devstack-tobiko-focal
     nodes:
       - name: controller
         # label: ubuntu-focal
@@ -12,6 +12,15 @@
           - controller
 
 
+- nodeset:
+    name: devstack-tobiko-jammy
+    nodes:
+      - name: controller
+        # label: ubuntu-jammy
+        label: nested-virt-ubuntu-jammy
+    groups: *STANDALONE_GROUPS
+
+
 - nodeset:
     name: devstack-tobiko-centos
     nodes: